GB1500780A - Mcraly type coating alloy - Google Patents
Mcraly type coating alloyInfo
- Publication number
- GB1500780A GB1500780A GB23056/75A GB2305675A GB1500780A GB 1500780 A GB1500780 A GB 1500780A GB 23056/75 A GB23056/75 A GB 23056/75A GB 2305675 A GB2305675 A GB 2305675A GB 1500780 A GB1500780 A GB 1500780A
- Authority
- GB
- United Kingdom
- Prior art keywords
- type coating
- coating
- coating alloy
- mcraly type
- produced
- 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
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
- F01D5/12—Blades
- F01D5/28—Selecting particular materials; Particular measures relating thereto; Measures against erosion or corrosion
- F01D5/288—Protective coatings for blades
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C19/00—Alloys based on nickel or cobalt
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C19/00—Alloys based on nickel or cobalt
- C22C19/03—Alloys based on nickel or cobalt based on nickel
- C22C19/05—Alloys based on nickel or cobalt based on nickel with chromium
- C22C19/058—Alloys based on nickel or cobalt based on nickel with chromium without Mo and W
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C30/00—Coating with metallic material characterised only by the composition of the metallic material, i.e. not characterised by the coating process
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T50/00—Aeronautics or air transport
- Y02T50/60—Efficient propulsion technologies, e.g. for aircraft
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/12—All metal or with adjacent metals
- Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
- Y10T428/12771—Transition metal-base component
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/12—All metal or with adjacent metals
- Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
- Y10T428/12771—Transition metal-base component
- Y10T428/12778—Alternative base metals from diverse categories
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/12—All metal or with adjacent metals
- Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
- Y10T428/12771—Transition metal-base component
- Y10T428/12861—Group VIII or IB metal-base component
- Y10T428/12875—Platinum group metal-base component
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/12—All metal or with adjacent metals
- Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
- Y10T428/12771—Transition metal-base component
- Y10T428/12861—Group VIII or IB metal-base component
- Y10T428/12944—Ni-base component
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Engineering & Computer Science (AREA)
- Coating By Spraying Or Casting (AREA)
- Other Surface Treatments For Metallic Materials (AREA)
- Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
- Physical Vapour Deposition (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
Abstract
1500780 M Cr At Y type coating alloy UNITED TECHNOLOGIES CORP 23 May 1975 [10 July 1974] 23056/75 Heading C7A A coating composition consisting of:- The coating may be produced by simultaneously vapour depositing Ni and/or Co, Cr, Al, R.E. and sputter depositing the Pt or Rh. The coating may be produced on Ni or Co superalloys used in jet engines.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US487074A US3918139A (en) | 1974-07-10 | 1974-07-10 | MCrAlY type coating alloy |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1500780A true GB1500780A (en) | 1978-02-08 |
Family
ID=23934299
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB23056/75A Expired GB1500780A (en) | 1974-07-10 | 1975-05-23 | Mcraly type coating alloy |
Country Status (13)
Country | Link |
---|---|
US (1) | US3918139A (en) |
JP (1) | JPS5842255B2 (en) |
BR (1) | BR7504327A (en) |
CA (1) | CA1158075A (en) |
CH (1) | CH606455A5 (en) |
DE (1) | DE2530197C2 (en) |
FR (1) | FR2277902A1 (en) |
GB (1) | GB1500780A (en) |
IL (1) | IL47407A (en) |
IN (1) | IN144076B (en) |
IT (1) | IT1039467B (en) |
NO (1) | NO141371C (en) |
SE (1) | SE410477B (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2457907A1 (en) * | 1979-05-29 | 1980-12-26 | Howmet Turbine Components | COATING COMPOSITION FOR PROTECTION AGAINST HIGH TEMPERATURE OXIDATION OF SUPER-ALLOYS AND COMPONENTS OF SUPER-ALLOYS THUS COATED |
FR2463191A1 (en) * | 1979-08-16 | 1981-02-20 | Howmet Turbine Components | COATING COMPOSITION FOR PROTECTION AGAINST HIGH TEMPERATURE OXIDATION AND SULFURATION OF SUPER-ALLOYS AND COMPONENTS OF SUPER-ALLOYS THUS COATED |
EP0401611A1 (en) * | 1989-06-06 | 1990-12-12 | H.C. Starck GmbH & Co. KG | High temperature composite material, process for its manufacture and its use |
Families Citing this family (60)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1520630A (en) * | 1974-07-08 | 1978-08-09 | Johnson Matthey Co Ltd | Platinum group metal-containing alloys |
US3976436A (en) * | 1975-02-13 | 1976-08-24 | General Electric Company | Metal of improved environmental resistance |
US4018569A (en) * | 1975-02-13 | 1977-04-19 | General Electric Company | Metal of improved environmental resistance |
US3993454A (en) * | 1975-06-23 | 1976-11-23 | United Technologies Corporation | Alumina forming coatings containing hafnium for high temperature applications |
US4029477A (en) * | 1975-10-29 | 1977-06-14 | General Electric Company | Coated Ni-Cr base dispersion-modified alloy article |
US4156582A (en) * | 1976-12-13 | 1979-05-29 | General Electric Company | Liquid cooled gas turbine buckets |
US4162349A (en) * | 1977-05-24 | 1979-07-24 | United Technologies Corporation | Fabrication of Co-Cr-Al-Y feed stock |
USRE30995E (en) * | 1977-06-09 | 1982-07-13 | General Electric Company | High integrity CoCrAl(Y) coated nickel-base superalloys |
US4101715A (en) * | 1977-06-09 | 1978-07-18 | General Electric Company | High integrity CoCrAl(Y) coated nickel-base superalloys |
US4123595A (en) * | 1977-09-22 | 1978-10-31 | General Electric Company | Metallic coated article |
US4123594A (en) * | 1977-09-22 | 1978-10-31 | General Electric Company | Metallic coated article of improved environmental resistance |
WO1979000343A1 (en) * | 1977-12-05 | 1979-06-14 | Secr Defence | Improvements in or relating to nickel-,cobalt-,and iron based alloys |
SE452633B (en) * | 1978-03-03 | 1987-12-07 | Johnson Matthey Co Ltd | Nickel base alloy with gamma primer matrix |
US4261742A (en) * | 1978-09-25 | 1981-04-14 | Johnson, Matthey & Co., Limited | Platinum group metal-containing alloys |
US4346137A (en) * | 1979-12-19 | 1982-08-24 | United Technologies Corporation | High temperature fatigue oxidation resistant coating on superalloy substrate |
US4419416A (en) * | 1981-08-05 | 1983-12-06 | United Technologies Corporation | Overlay coatings for superalloys |
US4615865A (en) * | 1981-08-05 | 1986-10-07 | United Technologies Corporation | Overlay coatings with high yttrium contents |
CA1209827A (en) * | 1981-08-05 | 1986-08-19 | David S. Duvall | Overlay coatings with high yttrium contents |
US4514469A (en) * | 1981-09-10 | 1985-04-30 | United Technologies Corporation | Peened overlay coatings |
US4465654A (en) * | 1982-03-02 | 1984-08-14 | Uop Inc. | Process for use of a noble metal and rare earth metal catalyst |
US4410454A (en) * | 1982-03-02 | 1983-10-18 | Uop Inc. | Noble metal and rare earth metal catalyst |
US4743514A (en) * | 1983-06-29 | 1988-05-10 | Allied-Signal Inc. | Oxidation resistant protective coating system for gas turbine components, and process for preparation of coated components |
US4578115A (en) * | 1984-04-05 | 1986-03-25 | Metco Inc. | Aluminum and cobalt coated thermal spray powder |
US4711665A (en) * | 1985-07-26 | 1987-12-08 | Pennsylvania Research Corporation | Oxidation resistant alloy |
US4897315A (en) * | 1985-10-15 | 1990-01-30 | United Technologies Corporation | Yttrium enriched aluminide coating for superalloys |
US4910092A (en) * | 1986-09-03 | 1990-03-20 | United Technologies Corporation | Yttrium enriched aluminide coating for superalloys |
GB8711698D0 (en) * | 1987-05-18 | 1987-06-24 | Secr Defence | Coated titanium articles(i) |
US5277936A (en) * | 1987-11-19 | 1994-01-11 | United Technologies Corporation | Oxide containing MCrAlY-type overlay coatings |
US4980244A (en) * | 1988-07-01 | 1990-12-25 | General Electric Company | Protective alloy coatings comprising Cr-Al-Ru containing one or more of Y, Fe, Ni and Co |
US4933239A (en) * | 1989-03-06 | 1990-06-12 | United Technologies Corporation | Aluminide coating for superalloys |
US4904546A (en) * | 1989-04-03 | 1990-02-27 | General Electric Company | Material system for high temperature jet engine operation |
US5759380A (en) * | 1989-04-04 | 1998-06-02 | General Electric Company | Method of preparing oxidation resistant coatings |
US5455119A (en) * | 1993-11-08 | 1995-10-03 | Praxair S.T. Technology, Inc. | Coating composition having good corrosion and oxidation resistance |
CN1068387C (en) * | 1994-06-24 | 2001-07-11 | 普拉塞尔·S·T·技术有限公司 | A process for producing an oxide dispersed mcraly-based coating |
US6458473B1 (en) | 1997-01-21 | 2002-10-01 | General Electric Company | Diffusion aluminide bond coat for a thermal barrier coating system and method therefor |
FR2787472B1 (en) | 1998-12-16 | 2001-03-09 | Onera (Off Nat Aerospatiale) | PROCESS FOR PRODUCING A METAL ALLOY POWDER OF THE MCRALY TYPE AND COATINGS OBTAINED THEREWITH |
FR2787471B1 (en) * | 1998-12-16 | 2001-03-09 | Onera (Off Nat Aerospatiale) | PROCESS FOR FORMING A METAL ALLOY COATING OF MCRALY TYPE |
DE19941228B4 (en) * | 1999-08-30 | 2009-12-31 | Alstom | Iron aluminide coating and its use |
US6284324B1 (en) | 2000-04-21 | 2001-09-04 | Eastman Chemical Company | Coal gasification burner shield coating |
US6582534B2 (en) * | 2001-10-24 | 2003-06-24 | General Electric Company | High-temperature alloy and articles made therefrom |
JP2003147464A (en) | 2001-11-02 | 2003-05-21 | Tocalo Co Ltd | Member with high-temperature strength |
US6634860B2 (en) * | 2001-12-20 | 2003-10-21 | General Electric Company | Foil formed structure for turbine airfoil tip |
EP1327702A1 (en) * | 2002-01-10 | 2003-07-16 | ALSTOM (Switzerland) Ltd | Mcraiy bond coating and method of depositing said mcraiy bond coating |
US7273662B2 (en) * | 2003-05-16 | 2007-09-25 | Iowa State University Research Foundation, Inc. | High-temperature coatings with Pt metal modified γ-Ni+γ′-Ni3Al alloy compositions |
ATE433502T1 (en) * | 2004-08-18 | 2009-06-15 | Univ Iowa State Res Found Inc | HIGH TEMPERATURE COATINGS AND SOLID ALLOYS MADE OF -NI+ '-NI3AL ALLOYS MODIFIED WITH ONE FROM THE PT GROUP AND HAVING HIGH TEMPERATURE CORROSION RESISTANCE |
US7229701B2 (en) * | 2004-08-26 | 2007-06-12 | Honeywell International, Inc. | Chromium and active elements modified platinum aluminide coatings |
US7531217B2 (en) * | 2004-12-15 | 2009-05-12 | Iowa State University Research Foundation, Inc. | Methods for making high-temperature coatings having Pt metal modified γ-Ni +γ′-Ni3Al alloy compositions and a reactive element |
NL1028629C2 (en) * | 2005-03-24 | 2006-10-02 | Netherlands Inst For Metals Re | Coating layer, substrate provided with a coating layer and method for applying a corrosion-resistant coating layer. |
JP2009522443A (en) | 2005-12-28 | 2009-06-11 | アンサルド エネルジア エス.ピー.エー. | Alloy composition for producing a protective coating, use thereof, method of application, and superalloy article coated with the composition |
US7727318B2 (en) * | 2007-01-09 | 2010-06-01 | General Electric Company | Metal alloy compositions and articles comprising the same |
US7846243B2 (en) * | 2007-01-09 | 2010-12-07 | General Electric Company | Metal alloy compositions and articles comprising the same |
US7931759B2 (en) * | 2007-01-09 | 2011-04-26 | General Electric Company | Metal alloy compositions and articles comprising the same |
US7879459B2 (en) * | 2007-06-27 | 2011-02-01 | United Technologies Corporation | Metallic alloy composition and protective coating |
US8920937B2 (en) * | 2007-08-05 | 2014-12-30 | United Technologies Corporation | Zirconium modified protective coating |
US8821654B2 (en) * | 2008-07-15 | 2014-09-02 | Iowa State University Research Foundation, Inc. | Pt metal modified γ-Ni+γ′-Ni3Al alloy compositions for high temperature degradation resistant structural alloys |
US20100028712A1 (en) * | 2008-07-31 | 2010-02-04 | Iowa State University Research Foundation, Inc. | y'-Ni3Al MATRIX PHASE Ni-BASED ALLOY AND COATING COMPOSITIONS MODIFIED BY REACTIVE ELEMENT CO-ADDITIONS AND Si |
US20130115072A1 (en) * | 2011-11-09 | 2013-05-09 | General Electric Company | Alloys for bond coatings and articles incorporating the same |
EP3071732B1 (en) | 2013-11-19 | 2019-11-13 | United Technologies Corporation | Article having variable composition coating |
RU2700848C2 (en) * | 2014-05-15 | 2019-09-23 | Нуово Пиньоне СРЛ | Turbomachine component manufacturing method, turbomachine component and turbomachine |
CN104443272A (en) * | 2014-12-02 | 2015-03-25 | 常熟市常连船舶设备有限公司 | Explosion-proof hatch cover |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3399058A (en) * | 1963-11-07 | 1968-08-27 | Garrett Corp | Sulfidation and oxidation resistant cobalt-base alloy |
US3589894A (en) * | 1968-05-31 | 1971-06-29 | Garrett Corp | Sulfidation resistant cobalt-base alloy |
US3754902A (en) * | 1968-06-05 | 1973-08-28 | United Aircraft Corp | Nickel base superalloy resistant to oxidation erosion |
US3649225A (en) * | 1969-11-17 | 1972-03-14 | United Aircraft Corp | Composite coating for the superalloys |
US3754903A (en) * | 1970-09-15 | 1973-08-28 | United Aircraft Corp | High temperature oxidation resistant coating alloy |
US3676085A (en) * | 1971-02-18 | 1972-07-11 | United Aircraft Corp | Cobalt base coating for the superalloys |
-
1974
- 1974-07-10 US US487074A patent/US3918139A/en not_active Expired - Lifetime
-
1975
- 1975-05-23 GB GB23056/75A patent/GB1500780A/en not_active Expired
- 1975-05-28 IN IN1079/CAL/1975A patent/IN144076B/en unknown
- 1975-06-03 IL IL47407A patent/IL47407A/en unknown
- 1975-06-04 CH CH721275A patent/CH606455A5/xx not_active IP Right Cessation
- 1975-06-19 SE SE7507095A patent/SE410477B/en unknown
- 1975-06-26 CA CA000230272A patent/CA1158075A/en not_active Expired
- 1975-06-27 IT IT24839/75A patent/IT1039467B/en active
- 1975-06-30 NO NO75752355A patent/NO141371C/en unknown
- 1975-07-03 FR FR7520876A patent/FR2277902A1/en active Granted
- 1975-07-05 DE DE2530197A patent/DE2530197C2/en not_active Expired
- 1975-07-09 BR BR7504327*A patent/BR7504327A/en unknown
- 1975-07-09 JP JP50084341A patent/JPS5842255B2/en not_active Expired
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2457907A1 (en) * | 1979-05-29 | 1980-12-26 | Howmet Turbine Components | COATING COMPOSITION FOR PROTECTION AGAINST HIGH TEMPERATURE OXIDATION OF SUPER-ALLOYS AND COMPONENTS OF SUPER-ALLOYS THUS COATED |
FR2463191A1 (en) * | 1979-08-16 | 1981-02-20 | Howmet Turbine Components | COATING COMPOSITION FOR PROTECTION AGAINST HIGH TEMPERATURE OXIDATION AND SULFURATION OF SUPER-ALLOYS AND COMPONENTS OF SUPER-ALLOYS THUS COATED |
EP0401611A1 (en) * | 1989-06-06 | 1990-12-12 | H.C. Starck GmbH & Co. KG | High temperature composite material, process for its manufacture and its use |
US5141821A (en) * | 1989-06-06 | 1992-08-25 | Hermann C. Starck Berlin Gmbh & Co Kg | High temperature mcral(y) composite material containing carbide particle inclusions |
Also Published As
Publication number | Publication date |
---|---|
AU8156075A (en) | 1976-12-02 |
DE2530197C2 (en) | 1983-02-03 |
DE2530197A1 (en) | 1976-01-29 |
US3918139A (en) | 1975-11-11 |
SE410477B (en) | 1979-10-15 |
CH606455A5 (en) | 1978-10-31 |
JPS5130530A (en) | 1976-03-15 |
FR2277902B1 (en) | 1978-07-28 |
IL47407A0 (en) | 1975-08-31 |
NO141371C (en) | 1980-02-27 |
IT1039467B (en) | 1979-12-10 |
IL47407A (en) | 1977-08-31 |
FR2277902A1 (en) | 1976-02-06 |
SE7507095L (en) | 1976-01-12 |
BR7504327A (en) | 1976-07-06 |
NO752355L (en) | 1976-01-13 |
JPS5842255B2 (en) | 1983-09-19 |
IN144076B (en) | 1978-03-18 |
CA1158075A (en) | 1983-12-06 |
NO141371B (en) | 1979-11-19 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed [section 19, patents act 1949] | ||
PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 19920523 |