GB1367724A - Multiple stage gas compression apparatus and method - Google Patents
Multiple stage gas compression apparatus and methodInfo
- Publication number
- GB1367724A GB1367724A GB4090472A GB4090472A GB1367724A GB 1367724 A GB1367724 A GB 1367724A GB 4090472 A GB4090472 A GB 4090472A GB 4090472 A GB4090472 A GB 4090472A GB 1367724 A GB1367724 A GB 1367724A
- Authority
- GB
- United Kingdom
- Prior art keywords
- compressor
- gas
- expander
- units
- unit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 238000000034 method Methods 0.000 title abstract 5
- 230000006835 compression Effects 0.000 title 1
- 238000007906 compression Methods 0.000 title 1
- 239000007789 gas Substances 0.000 abstract 9
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 abstract 2
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 abstract 1
- 101000650578 Salmonella phage P22 Regulatory protein C3 Proteins 0.000 abstract 1
- 101001040920 Triticum aestivum Alpha-amylase inhibitor 0.28 Proteins 0.000 abstract 1
- GRYLNZFGIOXLOG-DYCDLGHISA-N deuterio nitrate Chemical compound [2H]O[N+]([O-])=O GRYLNZFGIOXLOG-DYCDLGHISA-N 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 abstract 1
- 229910017604 nitric acid Inorganic materials 0.000 abstract 1
- 229910052757 nitrogen Inorganic materials 0.000 abstract 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B21/00—Nitrogen; Compounds thereof
- C01B21/20—Nitrogen oxides; Oxyacids of nitrogen; Salts thereof
- C01B21/24—Nitric oxide (NO)
- C01B21/26—Preparation by catalytic or non-catalytic oxidation of ammonia
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B21/00—Nitrogen; Compounds thereof
- C01B21/20—Nitrogen oxides; Oxyacids of nitrogen; Salts thereof
- C01B21/24—Nitric oxide (NO)
- C01B21/26—Preparation by catalytic or non-catalytic oxidation of ammonia
- C01B21/28—Apparatus
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C3/00—Gas-turbine plants characterised by the use of combustion products as the working fluid
- F02C3/36—Open cycles
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C6/00—Plural gas-turbine plants; Combinations of gas-turbine plants with other apparatus; Adaptations of gas-turbine plants for special use
- F02C6/04—Gas-turbine plants providing heated or pressurised working fluid for other apparatus, e.g. without mechanical power output
- F02C6/10—Gas-turbine plants providing heated or pressurised working fluid for other apparatus, e.g. without mechanical power output supplying working fluid to a user, e.g. a chemical process, which returns working fluid to a turbine of the plant
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D25/00—Pumping installations or systems
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
- F25J1/02—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process
- F25J1/0243—Start-up or control of the process; Details of the apparatus used; Details of the refrigerant compression system used
- F25J1/0279—Compression of refrigerant or internal recycle fluid, e.g. kind of compressor, accumulator, suction drum etc.
- F25J1/0281—Compression of refrigerant or internal recycle fluid, e.g. kind of compressor, accumulator, suction drum etc. characterised by the type of prime driver, e.g. hot gas expander
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
- F25J1/02—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process
- F25J1/0243—Start-up or control of the process; Details of the apparatus used; Details of the refrigerant compression system used
- F25J1/0279—Compression of refrigerant or internal recycle fluid, e.g. kind of compressor, accumulator, suction drum etc.
- F25J1/0294—Multiple compressor casings/strings in parallel, e.g. split arrangement
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
- F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
- F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
- F25J3/04006—Providing pressurised feed air or process streams within or from the air fractionation unit
- F25J3/04012—Providing pressurised feed air or process streams within or from the air fractionation unit by compression of warm gaseous streams; details of intake or interstage cooling
- F25J3/04018—Providing pressurised feed air or process streams within or from the air fractionation unit by compression of warm gaseous streams; details of intake or interstage cooling of main feed air
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
- F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
- F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
- F25J3/04006—Providing pressurised feed air or process streams within or from the air fractionation unit
- F25J3/04109—Arrangements of compressors and /or their drivers
- F25J3/04115—Arrangements of compressors and /or their drivers characterised by the type of prime driver, e.g. hot gas expander
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
- F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
- F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
- F25J3/04763—Start-up or control of the process; Details of the apparatus used
- F25J3/04866—Construction and layout of air fractionation equipments, e.g. valves, machines
- F25J3/04951—Arrangements of multiple air fractionation units or multiple equipments fulfilling the same process step, e.g. multiple trains in a network
- F25J3/04957—Arrangements of multiple air fractionation units or multiple equipments fulfilling the same process step, e.g. multiple trains in a network and inter-connecting equipments upstream of the fractionation unit (s), i.e. at the "front-end"
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J2230/00—Processes or apparatus involving steps for increasing the pressure of gaseous process streams
- F25J2230/20—Integrated compressor and process expander; Gear box arrangement; Multiple compressors on a common shaft
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J2230/00—Processes or apparatus involving steps for increasing the pressure of gaseous process streams
- F25J2230/24—Multiple compressors or compressor stages in parallel
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J2230/00—Processes or apparatus involving steps for increasing the pressure of gaseous process streams
- F25J2230/40—Processes or apparatus involving steps for increasing the pressure of gaseous process streams the fluid being air
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J2240/00—Processes or apparatus involving steps for expanding of process streams
- F25J2240/02—Expansion of a process fluid in a work-extracting turbine (i.e. isentropic expansion), e.g. of the feed stream
- F25J2240/04—Multiple expansion turbines in parallel
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J2240/00—Processes or apparatus involving steps for expanding of process streams
- F25J2240/90—Hot gas waste turbine of an indirect heated gas for power generation
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Thermal Sciences (AREA)
- Physics & Mathematics (AREA)
- Inorganic Chemistry (AREA)
- Combustion & Propulsion (AREA)
- General Chemical & Material Sciences (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Supercharger (AREA)
Abstract
1367724 Nitric acid D M WEATHERLY CO 4 Sept 1972 [10 Sept 1971] 40904/72 Heading C1A [Also in Division F1] A first gas stream to be used in a process is compressed by the use of energy extracted from a second gas stream containing gases produced during the process, there being at least two compressor-expander units each comprising a compressor driven by an expander, a first one of the units having the output of its compressor portion connected to the input of the compressor portion of a second one of the units, and the expander portion of the second unit having its output connected to the input of the expander portion of the first unit. A gas is compressed in successive stages C1 (or, as shown, C1 and C<1>I in parallel), CII and CIII, the compressor stages being driven by respective turbine stage TI (or, as shown, TI and T<1>I in parallel), TII and TIII. Each compressor stage, which may comprise one or more centrifugal impellers, and its driving turbine stage may comprise a unit of the type normally used as a turbocharger for an I.C. engine. The compressor, which may include intercoolers 17, 24, may supply compressed air to a process 60 (e.g. for manufacturing nitric acid) which produces hot gas (e.g. nitrogen) which can be supplied at 42 to drive the turbine stages. A supplementary supply 62 of hot gas, e.g. from another process or from a gas generator provided for that purpose, may be provided, or the hot gas may be reheated in a reheater 64 by means of a burner 65. The exhaust gas may be passed through a heat exchanger 50.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US17943671A | 1971-09-10 | 1971-09-10 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1367724A true GB1367724A (en) | 1974-09-25 |
Family
ID=22656589
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB4090472A Expired GB1367724A (en) | 1971-09-10 | 1972-09-04 | Multiple stage gas compression apparatus and method |
Country Status (13)
Country | Link |
---|---|
US (1) | US3715887A (en) |
JP (1) | JPS4875952A (en) |
AU (1) | AU4649672A (en) |
BE (1) | BE788368A (en) |
BR (1) | BR7206262D0 (en) |
CA (1) | CA966103A (en) |
CS (1) | CS166659B2 (en) |
DE (1) | DE2243996A1 (en) |
FR (1) | FR2155251A5 (en) |
GB (1) | GB1367724A (en) |
IT (1) | IT967016B (en) |
NL (1) | NL7212276A (en) |
PL (1) | PL83504B1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9109603B2 (en) | 2009-01-30 | 2015-08-18 | Gardner Denver Deutschland Gmbh | Multi-stage centrifugal compressors |
Families Citing this family (28)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3949557A (en) * | 1973-10-11 | 1976-04-13 | Michael Eskeli | Turbine |
US3977832A (en) * | 1975-01-20 | 1976-08-31 | Air Products And Chemicals, Inc. | System for control of a nitric acid plant |
GB1583648A (en) * | 1976-10-04 | 1981-01-28 | Acres Consulting Services | Compressed air power storage systems |
CH622317A5 (en) * | 1977-07-28 | 1981-03-31 | Bbc Brown Boveri & Cie | |
DE2856589C2 (en) * | 1978-12-29 | 1987-06-19 | Davy McKee AG, 6000 Frankfurt | Method and device for the temporary drive of the turbine(s) coupled to the air and/or nitrous gas compressor in a plant for the production of nitric acid |
JPS5979096A (en) * | 1982-10-27 | 1984-05-08 | Shimadzu Corp | Multistage compressor |
DE3536451A1 (en) * | 1985-10-12 | 1987-04-16 | Steinmueller Gmbh L & C | PRESSURE-CHARGED OPERATING FIRING FOR A STEAM GENERATOR |
WO1994015096A1 (en) * | 1991-04-02 | 1994-07-07 | Sieber Joseph D | Wave powered energy generator |
DE4123208C2 (en) * | 1991-07-10 | 1996-07-11 | Mannesmann Ag | Compressor system |
IL108546A (en) * | 1994-02-03 | 1997-01-10 | Israel Electric Corp Ltd | Compressed air energy storage method and system |
US5687570A (en) * | 1994-02-28 | 1997-11-18 | Ormat Industries Ltd. | Externally fired combined cycle gas turbine system |
US5799490A (en) * | 1994-03-03 | 1998-09-01 | Ormat Industries Ltd. | Externally fired combined cycle gas turbine |
US7690900B2 (en) * | 2005-05-18 | 2010-04-06 | Joe Sieber | Wave energy accumulator |
US7961835B2 (en) | 2005-08-26 | 2011-06-14 | Keller Michael F | Hybrid integrated energy production process |
US9284964B2 (en) | 2010-05-21 | 2016-03-15 | Exxonmobil Upstream Research Company | Parallel dynamic compressor arrangement and methods related thereto |
JP5863320B2 (en) * | 2011-08-05 | 2016-02-16 | 三菱重工コンプレッサ株式会社 | Centrifugal compressor |
DE102011122142A1 (en) * | 2011-12-22 | 2013-06-27 | Thyssenkrupp Uhde Gmbh | Process and apparatus for the production of nitric acid |
JP5611253B2 (en) * | 2012-02-23 | 2014-10-22 | 三菱重工業株式会社 | Compressor control device, control method therefor, and compressor system |
WO2014028623A1 (en) * | 2012-08-17 | 2014-02-20 | Vinod Kumar Arora | Ammonia plant upgrading-multistage integrated chilling of process air compressor with ammonia compressor followed by air flow split and multistage air preheating to secondary ammonia reformer |
US10443603B2 (en) * | 2012-10-03 | 2019-10-15 | Praxair Technology, Inc. | Method for compressing an incoming feed air stream in a cryogenic air separation plant |
US9234530B1 (en) * | 2013-03-13 | 2016-01-12 | Exelis Inc. | Thermal energy recovery |
EP2969157B1 (en) * | 2013-03-14 | 2018-12-26 | Dresser-Rand Company | System and method for sidestream mixing |
US10047753B2 (en) | 2014-03-10 | 2018-08-14 | Dresser-Rand Company | System and method for sidestream mixing |
US9228485B2 (en) * | 2013-04-25 | 2016-01-05 | Electro-Motive Diesel, Inc. | Air handling system having cooling assembly |
US9709069B2 (en) | 2013-10-22 | 2017-07-18 | Dayspring Church Of God Apostolic | Hybrid drive engine |
JP6049807B2 (en) * | 2015-06-08 | 2016-12-21 | 三菱重工コンプレッサ株式会社 | Centrifugal compressor |
US11492964B2 (en) | 2020-11-25 | 2022-11-08 | Michael F. Keller | Integrated supercritical CO2/multiple thermal cycles |
CN113565589A (en) * | 2021-05-21 | 2021-10-29 | 南方电网科学研究院有限责任公司 | Jet afterburning compressed air energy storage system |
-
0
- BE BE788368D patent/BE788368A/en unknown
-
1971
- 1971-09-10 US US00179436A patent/US3715887A/en not_active Expired - Lifetime
-
1972
- 1972-08-30 FR FR7230852A patent/FR2155251A5/fr not_active Expired
- 1972-09-04 GB GB4090472A patent/GB1367724A/en not_active Expired
- 1972-09-05 CA CA150,931A patent/CA966103A/en not_active Expired
- 1972-09-07 DE DE2243996A patent/DE2243996A1/en active Pending
- 1972-09-08 PL PL1972157652A patent/PL83504B1/pl unknown
- 1972-09-08 NL NL7212276A patent/NL7212276A/xx unknown
- 1972-09-08 CS CS6159A patent/CS166659B2/cs unknown
- 1972-09-09 JP JP47090063A patent/JPS4875952A/ja active Pending
- 1972-09-09 IT IT83410/72A patent/IT967016B/en active
- 1972-09-11 AU AU46496/72A patent/AU4649672A/en not_active Expired
- 1972-09-11 BR BR006262/72A patent/BR7206262D0/en unknown
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9109603B2 (en) | 2009-01-30 | 2015-08-18 | Gardner Denver Deutschland Gmbh | Multi-stage centrifugal compressors |
Also Published As
Publication number | Publication date |
---|---|
DE2243996A1 (en) | 1973-04-05 |
IT967016B (en) | 1974-02-28 |
US3715887A (en) | 1973-02-13 |
CA966103A (en) | 1975-04-15 |
NL7212276A (en) | 1973-03-13 |
CS166659B2 (en) | 1976-03-29 |
JPS4875952A (en) | 1973-10-12 |
BR7206262D0 (en) | 1973-08-21 |
BE788368A (en) | 1973-01-02 |
PL83504B1 (en) | 1975-12-31 |
AU4649672A (en) | 1974-03-21 |
FR2155251A5 (en) | 1973-05-18 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed [section 19, patents act 1949] | ||
PLNP | Patent lapsed through nonpayment of renewal fees |