ATA15777A - Verfahren zur herstellung rohrfoermige filter- elemente - Google Patents
Verfahren zur herstellung rohrfoermige filter- elementeInfo
- Publication number
- ATA15777A ATA15777A AT15777A AT15777A ATA15777A AT A15777 A ATA15777 A AT A15777A AT 15777 A AT15777 A AT 15777A AT 15777 A AT15777 A AT 15777A AT A15777 A ATA15777 A AT A15777A
- Authority
- AT
- Austria
- Prior art keywords
- filter elements
- tubular filter
- producing tubular
- producing
- elements
- Prior art date
Links
- 238000004519 manufacturing process Methods 0.000 title 1
Classifications
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/54—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by welding together the fibres, e.g. by partially melting or dissolving
- D04H1/56—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by welding together the fibres, e.g. by partially melting or dissolving in association with fibre formation, e.g. immediately following extrusion of staple fibres
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D25/00—Filters formed by clamping together several filtering elements or parts of such elements
- B01D25/22—Cell-type filters
- B01D25/24—Cell-type roll filters
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/11—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with bag, cage, hose, tube, sleeve or like filtering elements
- B01D29/111—Making filtering elements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/11—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with bag, cage, hose, tube, sleeve or like filtering elements
- B01D29/13—Supported filter elements
- B01D29/23—Supported filter elements arranged for outward flow filtration
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D39/00—Filtering material for liquid or gaseous fluids
- B01D39/14—Other self-supporting filtering material ; Other filtering material
- B01D39/16—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres
- B01D39/1607—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres the material being fibrous
- B01D39/1623—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres the material being fibrous of synthetic origin
- B01D39/163—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres the material being fibrous of synthetic origin sintered or bonded
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D39/00—Filtering material for liquid or gaseous fluids
- B01D39/14—Other self-supporting filtering material ; Other filtering material
- B01D39/20—Other self-supporting filtering material ; Other filtering material of inorganic material, e.g. asbestos paper, metallic filtering material of non-woven wires
- B01D39/2003—Glass or glassy material
- B01D39/2017—Glass or glassy material the material being filamentary or fibrous
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2201/00—Details relating to filtering apparatus
- B01D2201/18—Filters characterised by the openings or pores
- B01D2201/182—Filters characterised by the openings or pores for depth filtration
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
- B01D2239/04—Additives and treatments of the filtering material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
- B01D2239/04—Additives and treatments of the filtering material
- B01D2239/0414—Surface modifiers, e.g. comprising ion exchange groups
- B01D2239/0428—Rendering the filter material hydrophobic
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
- B01D2239/04—Additives and treatments of the filtering material
- B01D2239/0464—Impregnants
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
- B01D2239/06—Filter cloth, e.g. knitted, woven non-woven; self-supported material
- B01D2239/065—More than one layer present in the filtering material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
- B01D2239/06—Filter cloth, e.g. knitted, woven non-woven; self-supported material
- B01D2239/065—More than one layer present in the filtering material
- B01D2239/0654—Support layers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
- B01D2239/06—Filter cloth, e.g. knitted, woven non-woven; self-supported material
- B01D2239/065—More than one layer present in the filtering material
- B01D2239/0681—The layers being joined by gluing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
- B01D2239/06—Filter cloth, e.g. knitted, woven non-woven; self-supported material
- B01D2239/069—Special geometry of layers
- B01D2239/0695—Wound layers
-
- 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
- Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
- Y10T156/10—Methods of surface bonding and/or assembly therefor
- Y10T156/1002—Methods of surface bonding and/or assembly therefor with permanent bending or reshaping or surface deformation of self sustaining lamina
- Y10T156/1043—Subsequent to assembly
- Y10T156/1049—Folding only
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Filtering Materials (AREA)
- Nonwoven Fabrics (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
- Filtration Of Liquid (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US05/649,001 US4112159A (en) | 1973-08-31 | 1976-01-14 | Continuous production of tubular modular filter elements using nonwoven webs from thermoplastic fibers and products |
Publications (2)
Publication Number | Publication Date |
---|---|
ATA15777A true ATA15777A (de) | 1980-06-15 |
AT360766B AT360766B (de) | 1981-01-26 |
Family
ID=24603082
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
AT15777A AT360766B (de) | 1976-01-14 | 1977-01-13 | Verfahren zur herstellung rohrfoermiger filter- elemente |
Country Status (22)
Country | Link |
---|---|
US (1) | US4116738A (de) |
JP (1) | JPS52107677A (de) |
AT (1) | AT360766B (de) |
AU (1) | AU510425B2 (de) |
BE (1) | BE850368A (de) |
BR (1) | BR7700241A (de) |
CA (1) | CA1063946A (de) |
CH (1) | CH619375A5 (de) |
DE (1) | DE2701167C2 (de) |
DK (1) | DK149524C (de) |
ES (1) | ES455000A1 (de) |
FI (1) | FI65170C (de) |
FR (1) | FR2338341A1 (de) |
GB (1) | GB1539331A (de) |
IL (1) | IL51212A (de) |
IT (1) | IT1082691B (de) |
NL (1) | NL177001C (de) |
NO (1) | NO149491C (de) |
NZ (1) | NZ183077A (de) |
PT (1) | PT66070B (de) |
SE (1) | SE430758B (de) |
ZA (1) | ZA7769B (de) |
Families Citing this family (63)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4475972A (en) * | 1981-10-01 | 1984-10-09 | Ontario Research Foundation | Implantable material |
US4731215A (en) * | 1982-06-07 | 1988-03-15 | Biax Fiberfilm Corporation | Process for forming non-woven webs from highly oriented melt blown fibers |
US4847125A (en) * | 1982-06-07 | 1989-07-11 | Biax Fiberfilm Corporation | Tube of oriented, heat shrunk, melt blown fibers |
US4594202A (en) * | 1984-01-06 | 1986-06-10 | Pall Corporation | Method of making cylindrical fibrous filter structures |
US4726901A (en) * | 1984-01-06 | 1988-02-23 | Pall Corporation | Cylindrical fibrous structures with graded pore size |
US4712553A (en) * | 1985-05-30 | 1987-12-15 | Cordis Corporation | Sutures having a porous surface |
US4880002A (en) * | 1985-05-30 | 1989-11-14 | Corvita Corporation | Stretchable porous sutures |
US4824451A (en) * | 1985-12-31 | 1989-04-25 | Kimberly-Clark Corporation | Melt-blown filter medium |
US4714647A (en) * | 1986-05-02 | 1987-12-22 | Kimberly-Clark Corporation | Melt-blown material with depth fiber size gradient |
US4983292A (en) * | 1988-06-27 | 1991-01-08 | Morgan Jr H William | Seamless filter bag and method of its manufacture |
TW206266B (de) * | 1991-06-12 | 1993-05-21 | Toray Industries | |
US5190502A (en) * | 1992-02-07 | 1993-03-02 | Dayco Products, Inc. | Belt tensioning system, belt tensioner therefor and methods of making the same |
GB9307710D0 (en) * | 1993-04-14 | 1993-06-02 | Rothmans Benson & Hedges | Smoking apparatus-l |
US5366576A (en) * | 1993-04-14 | 1994-11-22 | Clack Corporation | Method for producing tubular products from nonwoven fibers |
US5409642A (en) * | 1993-10-06 | 1995-04-25 | Exxon Chemical Patents Inc. | Melt blowing of tubular filters |
US5431829A (en) * | 1993-12-16 | 1995-07-11 | Pall Corporation | Polymethylpentene filtration medium |
US6214143B1 (en) * | 1994-05-13 | 2001-04-10 | Johns Mansville International, Inc. | Method and apparatus for forming a uniform blanket of synthetic or glass fibers |
WO1996003194A1 (en) * | 1994-07-28 | 1996-02-08 | Pall Corporation | Fibrous web and process of preparing same |
US5582907A (en) * | 1994-07-28 | 1996-12-10 | Pall Corporation | Melt-blown fibrous web |
US5591335A (en) * | 1995-05-02 | 1997-01-07 | Memtec America Corporation | Filter cartridges having nonwoven melt blown filtration media with integral co-located support and filtration |
US5639369A (en) * | 1995-07-14 | 1997-06-17 | W. L. Gore & Associates, Inc. | Filter element |
US5827430A (en) * | 1995-10-24 | 1998-10-27 | Perry Equipment Corporation | Coreless and spirally wound non-woven filter element |
US5725812A (en) * | 1996-07-08 | 1998-03-10 | Aaf International | Melt blowing apparatus and method for forming a fibrous layered web of filter media including a fluid distribution arrangement |
US5653833A (en) * | 1996-07-25 | 1997-08-05 | Memtec America Corporation | Method for integrally joining preformed thermoplastic core elements especially adapted for the continuous manufacture of melt-blown filter cartridges |
US5772952A (en) * | 1997-02-07 | 1998-06-30 | J&M Laboratories, Inc. | Process of making meltblown yarn |
US6086696A (en) * | 1998-07-21 | 2000-07-11 | The Boeing Company | Method of forming a seamless, cylindrical, thermoplastic structure with a multiple compaction roller winder |
US6417120B1 (en) | 1998-12-31 | 2002-07-09 | Kimberly-Clark Worldwide, Inc. | Particle-containing meltblown webs |
US6319342B1 (en) | 1998-12-31 | 2001-11-20 | Kimberly-Clark Worldwide, Inc. | Method of forming meltblown webs containing particles |
US6342283B1 (en) | 1999-03-30 | 2002-01-29 | Usf Filtration & Separations, Inc. | Melt-blown tubular core elements and filter cartridges including the same |
US6358417B1 (en) * | 1999-04-21 | 2002-03-19 | Osmonics, Inc. | Non-woven depth filter element |
US6446814B1 (en) | 1999-04-22 | 2002-09-10 | Joseph A. King | Method of making a dual filter |
US7168574B2 (en) * | 1999-04-22 | 2007-01-30 | King Technology | Dual filter |
US20020155776A1 (en) * | 1999-10-15 | 2002-10-24 | Mitchler Patricia Ann | Particle-containing meltblown webs |
US6494974B2 (en) | 1999-10-15 | 2002-12-17 | Kimberly-Clark Worldwide, Inc. | Method of forming meltblown webs containing particles |
US6652871B1 (en) * | 2000-01-21 | 2003-11-25 | Joseph A. King | Delivery system and method of making article |
CA2331084C (en) * | 2000-01-21 | 2011-10-25 | King Technology, Inc. | Water treatment |
ATE303192T1 (de) * | 2000-07-28 | 2005-09-15 | H William Morgan Jr | Verfahren zur herstellung von filtern |
US6736274B2 (en) | 2001-08-17 | 2004-05-18 | Total Filter Technology, Inc. | Nonwoven tubular filter extracting |
WO2003035958A1 (en) * | 2001-10-23 | 2003-05-01 | Osmonics, Inc. | Three-dimensional non-woven media, filter and process |
AU784837B2 (en) * | 2001-11-13 | 2006-07-06 | William H. Morgan | Impregnated micro-fiber filtration unit |
US20060031111A9 (en) * | 2002-05-30 | 2006-02-09 | Whymark Thomas J | Multi-market broadcast tracking, management and reporting method and system |
WO2003103797A1 (en) * | 2002-06-07 | 2003-12-18 | Parametric Innovations, Inc. | Advancing tubular filter products |
EP1683432A1 (de) * | 2003-04-03 | 2006-07-26 | Hauni Maschinenbau Aktiengesellschaft | Verfahren und Vorrichtung zur Herstellung eines Vlieses für die Herstellung von Filterstäben |
CA2526394A1 (en) * | 2003-06-06 | 2004-12-23 | Pall Corporation | Fluid treatment element |
US8277654B2 (en) * | 2003-11-26 | 2012-10-02 | Selecto, Inc. | Water purification apparatus and system |
US20060230727A1 (en) * | 2005-04-19 | 2006-10-19 | Morgan Howard W | Filtration element having a variable density sidewall |
US20060231486A1 (en) * | 2005-04-19 | 2006-10-19 | Morgan Howard W | Filtration element having a variable density sidewall |
KR20060110230A (ko) * | 2005-04-19 | 2006-10-24 | 윌리엄 모건 하워드 | 가변성의 밀도 측벽을 가진 필터소자 및 그 제조방법 |
US8114183B2 (en) * | 2005-09-20 | 2012-02-14 | Cummins Filtration Ip Inc. | Space optimized coalescer |
US20070062886A1 (en) * | 2005-09-20 | 2007-03-22 | Rego Eric J | Reduced pressure drop coalescer |
US7674425B2 (en) * | 2005-11-14 | 2010-03-09 | Fleetguard, Inc. | Variable coalescer |
US8231752B2 (en) * | 2005-11-14 | 2012-07-31 | Cummins Filtration Ip Inc. | Method and apparatus for making filter element, including multi-characteristic filter element |
WO2011053452A1 (en) * | 2009-10-27 | 2011-05-05 | Dow Global Technologies Llc | Method for applying tape layer to outer periphery of spiral wound module |
JP5489084B2 (ja) * | 2011-08-12 | 2014-05-14 | Jnc株式会社 | 混繊長繊維不織布 |
FR2993475B1 (fr) * | 2012-07-19 | 2015-06-26 | Cummins Filtration Sarl | Ensemble de filtrage comportant une cartouche de filtration amovible |
DE102013111956A1 (de) | 2013-10-30 | 2015-04-30 | Egeplast International Gmbh | Verfahren zur kontinuierlichen Fertigung von Kunststoffrohren |
US11845019B2 (en) | 2013-11-06 | 2023-12-19 | Bl Technologies, Inc. | Large format melt-blown depth filter cartridge |
JP6353532B2 (ja) | 2013-11-06 | 2018-07-04 | ゼネラル・エレクトリック・カンパニイ | メルトブローによるデプスフィルタカートリッジ |
US20150182895A1 (en) * | 2013-12-31 | 2015-07-02 | Bha Altair, Llc | Process for making rigid porous plastic tubular filters |
US20160023136A1 (en) * | 2014-07-28 | 2016-01-28 | Graver Technologies Llc | End Plug for Precoat Filter Element |
US9260800B1 (en) | 2015-02-04 | 2016-02-16 | Thomas M. Tao | Melt-blowing apparatus with improved puller device for producing tubular nonwovens |
CN107405554B (zh) | 2015-04-28 | 2020-11-27 | 通用电气公司 | 熔喷深度过滤器元件、制作其的方法和机器 |
EP3678755A4 (de) * | 2017-09-07 | 2021-05-19 | Porex Corporation | Rohrförmiger poröser faserfilter mit kleinem durchmesser |
Family Cites Families (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2946449A (en) * | 1957-08-15 | 1960-07-26 | Ernest C Shaw | Liquid filters |
DE1436311A1 (de) * | 1964-02-21 | 1969-07-10 | Freudenberg Carl Fa | Verfahren zur Herstellung von zylindrischen Filterkoerpern aus Faservliesen |
US3354244A (en) * | 1964-08-13 | 1967-11-21 | Hudson Engineering Corp | Method and apparatus for the manufacture of foamed plastic tubing |
GB1104680A (en) * | 1965-10-18 | 1968-02-28 | Univ Birmingham | Artificial artery |
US3498873A (en) * | 1965-10-29 | 1970-03-03 | Dow Chemical Co | Net structures of multicomponent filaments |
US3477892A (en) * | 1966-01-21 | 1969-11-11 | Owens Illinois Inc | Method and apparatus for forming plastic tubular netting |
US3615998A (en) * | 1968-07-10 | 1971-10-26 | Celanese Corp | Method of biaxially oriented nonwoven tubular material |
DE1902533A1 (de) * | 1969-01-18 | 1970-09-10 | Bauknecht Gmbh G | Entnahmevorrichtung fuer Materialkaesten |
DE2111743C3 (de) * | 1970-04-02 | 1973-10-11 | Kimikazu Fujisawa Kanagawa Azuma (Japan) | Verfahren und Vorrichtung zur Her Stellung von schlauchfbrmigen Schaum stoff Netzen |
DE2131236A1 (de) * | 1971-06-24 | 1973-01-11 | Domnick Hunter Holdings | Mikroporoeser faserfilter |
US3801400A (en) * | 1972-03-24 | 1974-04-02 | Celanese Corp | Varying density cartridge filters |
US3933557A (en) * | 1973-08-31 | 1976-01-20 | Pall Corporation | Continuous production of nonwoven webs from thermoplastic fibers and products |
US3905734A (en) * | 1973-12-26 | 1975-09-16 | Beloit Corp | Continuous tube forming by melt blowing technique |
US3909174A (en) * | 1973-12-26 | 1975-09-30 | Beloit Corp | Continuous tube forming by melt blowing technique |
US3905736A (en) * | 1973-12-26 | 1975-09-16 | Beloit Corp | Sheet web generation via a tubularly formed web |
US3929957A (en) * | 1975-03-05 | 1975-12-30 | Dayco Corp | Method for producing a continuous flexible reinforced tubular conduit |
-
1977
- 1977-01-05 IL IL51212A patent/IL51212A/xx unknown
- 1977-01-06 ZA ZA770069A patent/ZA7769B/xx unknown
- 1977-01-06 GB GB370/77A patent/GB1539331A/en not_active Expired
- 1977-01-07 AU AU21136/77A patent/AU510425B2/en not_active Expired
- 1977-01-07 FR FR7700401A patent/FR2338341A1/fr active Granted
- 1977-01-11 NL NLAANVRAGE7700224,A patent/NL177001C/xx not_active IP Right Cessation
- 1977-01-12 FI FI770092A patent/FI65170C/fi not_active IP Right Cessation
- 1977-01-12 CH CH36677A patent/CH619375A5/de not_active IP Right Cessation
- 1977-01-13 AT AT15777A patent/AT360766B/de not_active IP Right Cessation
- 1977-01-13 ES ES455000A patent/ES455000A1/es not_active Expired
- 1977-01-13 BR BR7700241A patent/BR7700241A/pt unknown
- 1977-01-13 DE DE2701167A patent/DE2701167C2/de not_active Expired
- 1977-01-13 IT IT47622/77A patent/IT1082691B/it active
- 1977-01-13 PT PT66070A patent/PT66070B/pt unknown
- 1977-01-13 CA CA269,641A patent/CA1063946A/en not_active Expired
- 1977-01-13 NO NO770108A patent/NO149491C/no unknown
- 1977-01-13 NZ NZ183077A patent/NZ183077A/xx unknown
- 1977-01-13 DK DK12277A patent/DK149524C/da not_active IP Right Cessation
- 1977-01-13 SE SE7700278A patent/SE430758B/xx unknown
- 1977-01-14 JP JP345077A patent/JPS52107677A/ja active Granted
- 1977-01-14 BE BE174065A patent/BE850368A/xx not_active IP Right Cessation
- 1977-04-25 US US05/792,084 patent/US4116738A/en not_active Expired - Lifetime
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