DK563481A - Filtagtigt lagdelt sammensat materiale af polytetrafluorethylen og glasfiberpapir samt fremgangsmaade til dets fremstilling - Google Patents
Filtagtigt lagdelt sammensat materiale af polytetrafluorethylen og glasfiberpapir samt fremgangsmaade til dets fremstillingInfo
- Publication number
- DK563481A DK563481A DK563481A DK563481A DK563481A DK 563481 A DK563481 A DK 563481A DK 563481 A DK563481 A DK 563481A DK 563481 A DK563481 A DK 563481A DK 563481 A DK563481 A DK 563481A
- Authority
- DK
- Denmark
- Prior art keywords
- filtery
- polytetrafluorethylen
- procedure
- preparation
- composite material
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
- B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
- B32B5/06—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer characterised by a fibrous or filamentary layer mechanically connected, e.g. by needling to another layer, e.g. of fibres, of paper
-
- 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
-
- 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
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
- B32B5/22—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
- B32B5/24—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer
- B32B5/26—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer another layer next to it also being fibrous or filamentary
-
- 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
- D04H1/42—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 characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
- D04H1/4209—Inorganic fibres
- D04H1/4218—Glass fibres
-
- 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
- D04H1/42—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 characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
- D04H1/4374—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 characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece using different kinds of webs, e.g. by layering webs
-
- 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
- D04H1/44—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 the fleeces or layers being consolidated by mechanical means, e.g. by rolling
- D04H1/46—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 the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres
- D04H1/498—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 the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres entanglement of layered webs
-
- 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
- D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
- D04H3/005—Synthetic yarns or filaments
- D04H3/007—Addition polymers
-
- 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
- D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
- D04H3/02—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of forming fleeces or layers, e.g. reorientation of yarns or filaments
- D04H3/04—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of forming fleeces or layers, e.g. reorientation of yarns or filaments in rectilinear paths, e.g. crossing at right angles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
- B32B2262/02—Synthetic macromolecular fibres
- B32B2262/0253—Polyolefin fibres
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
- B32B2262/10—Inorganic fibres
- B32B2262/101—Glass fibres
-
- 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
- Y10T428/31504—Composite [nonstructural laminate]
- Y10T428/3154—Of fluorinated addition polymer from unsaturated monomers
- Y10T428/31544—Addition polymer is perhalogenated
-
- 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
- Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
- Y10T442/10—Scrim [e.g., open net or mesh, gauze, loose or open weave or knit, etc.]
- Y10T442/102—Woven scrim
- Y10T442/159—Including a nonwoven fabric which is not a scrim
- Y10T442/16—Two or more nonwoven layers
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mechanical Engineering (AREA)
- Inorganic Chemistry (AREA)
- Filtering Materials (AREA)
- Laminated Bodies (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
- Nonwoven Fabrics (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US06/218,214 US4324574A (en) | 1980-12-19 | 1980-12-19 | Felt-like layered composite of PTFE and glass paper |
US21821480 | 1980-12-19 |
Publications (3)
Publication Number | Publication Date |
---|---|
DK563481A true DK563481A (da) | 1982-06-20 |
DK158797B DK158797B (da) | 1990-07-16 |
DK158797C DK158797C (da) | 1990-12-10 |
Family
ID=22814205
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DK563481A DK158797C (da) | 1980-12-19 | 1981-12-18 | Filtagtigt lagdelt sammensat materiale af polytetrafluorethylen og glasfiberpapir |
Country Status (7)
Country | Link |
---|---|
US (1) | US4324574A (da) |
EP (1) | EP0055112B1 (da) |
JP (1) | JPS57126655A (da) |
AU (1) | AU542175B2 (da) |
CA (1) | CA1170026A (da) |
DE (1) | DE3169483D1 (da) |
DK (1) | DK158797C (da) |
Families Citing this family (75)
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US4421166A (en) * | 1981-05-18 | 1983-12-20 | Cain Robert W | Apparatus for injecting material into a well-bore |
US4469598A (en) * | 1982-12-09 | 1984-09-04 | The Hilliard Corporation | Filter device |
US4650505A (en) * | 1983-10-17 | 1987-03-17 | A/S Fisker & Nielsen | Cleaner apparatus for toxic or hazardous substances |
US4643981A (en) * | 1983-11-09 | 1987-02-17 | Akzo N.V. | Pressure filtration system |
US4531957A (en) * | 1984-01-13 | 1985-07-30 | Abdul Malik | Filtering material and filtration apparatus employing the filtering material |
US4878930A (en) * | 1984-03-15 | 1989-11-07 | W. L. Gore & Associates, Inc. | Filter cartridge |
US4604203A (en) * | 1984-09-14 | 1986-08-05 | Minnesota Mining And Manufacturing Co. | Cooking oil filtering apparatus and filter therefor |
JPS61278319A (ja) * | 1985-06-01 | 1986-12-09 | Kurabo Ind Ltd | 厚み濾過カ−トリツジ |
JPS6249922A (ja) * | 1985-08-28 | 1987-03-04 | Kurabo Ind Ltd | 多層構造フイルタ−エレメント |
US4734236A (en) * | 1985-12-02 | 1988-03-29 | Sheller-Globe Corporation | Method for forming fiber web for compression molding structural substrates for panels |
US4612237A (en) * | 1985-12-13 | 1986-09-16 | E. I. Du Pont De Nemours And Company | Hydraulically entangled PTFE/glass filter felt |
EP0246917B1 (en) * | 1986-05-23 | 1992-07-22 | W.L. Gore & Associates, Inc. | High performance gas filter |
WO1988010146A1 (en) * | 1987-06-25 | 1988-12-29 | Scientific Glass Engineering Pty. Ltd. | Filter element for liquid chromatography |
US4816328A (en) * | 1987-11-13 | 1989-03-28 | W. L. Gore & Associates, Inc. | Breathable, non-linting laminate |
US4861353A (en) * | 1987-12-07 | 1989-08-29 | E. I. Du Pont De Nemours And Company | Filter element and assembly |
US4915714A (en) * | 1988-06-23 | 1990-04-10 | Teague Richard K | Fiber bed element and process for removing small particles of liquids and solids from a gas stream |
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US4983434A (en) * | 1989-04-07 | 1991-01-08 | W. L. Gore & Associates, Inc. | Filter laminates |
CA1278533C (en) * | 1989-08-22 | 1991-01-02 | E. Lee Noddin | Polyimide composite filter fabrics |
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US5108474A (en) * | 1991-01-03 | 1992-04-28 | W. L. Gore & Associates, Inc. | Smoke filter |
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US5269925A (en) * | 1992-05-04 | 1993-12-14 | Exxon Research And Engineering Company | Filter comprising multiple layers of non-woven filter fabric of decreasing porosity |
JP3259782B2 (ja) * | 1992-07-31 | 2002-02-25 | 東洋紡績株式会社 | 空気清浄用フィルター濾材 |
US5980616A (en) * | 1993-02-16 | 1999-11-09 | Donaldson Company, Inc. | Filter media for preventing carbon migration |
US5429864A (en) * | 1993-10-06 | 1995-07-04 | E. I. Du Pont De Nemours And Company | High efficiency filter fabric for hot gas filtration |
US5566434A (en) * | 1994-06-15 | 1996-10-22 | Jps Automotive Products Corporation | Air bag for use in a motor vehicle and method of producing same |
US6264684B1 (en) | 1995-03-10 | 2001-07-24 | Impra, Inc., A Subsidiary Of C.R. Bard, Inc. | Helically supported graft |
US6451047B2 (en) | 1995-03-10 | 2002-09-17 | Impra, Inc. | Encapsulated intraluminal stent-graft and methods of making same |
US6579314B1 (en) * | 1995-03-10 | 2003-06-17 | C.R. Bard, Inc. | Covered stent with encapsulated ends |
ZA965181B (en) * | 1995-06-20 | 1997-03-20 | Donaldson Co Inc | Filter and method for making a filter |
GB2335379A (en) * | 1995-09-29 | 1999-09-22 | Upf Corp | Filter composite |
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US6165572A (en) * | 1995-11-17 | 2000-12-26 | Donaldson Company, Inc. | Filter material construction and method |
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US5858044A (en) * | 1996-07-11 | 1999-01-12 | Donaldson Company, Inc. | Filter arrangement including removable filter with first and second media secured together |
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JP3365617B2 (ja) * | 1998-06-11 | 2003-01-14 | 日東電工株式会社 | エアフィルタ用濾材の製造方法 |
JP2000079332A (ja) * | 1998-07-08 | 2000-03-21 | Nitto Denko Corp | エアフィルタ用ろ材 |
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US6695148B2 (en) | 1999-05-27 | 2004-02-24 | Edward C. Homonoff | Transmission filter felt |
US20050106970A1 (en) * | 2000-09-01 | 2005-05-19 | Stanitis Gary E. | Melt processable perfluoropolymer forms |
US7015159B2 (en) * | 2001-07-24 | 2006-03-21 | E. I. Du Pont De Nemours And Company | Nonwoven material for low friction bearing surfaces |
DE20117862U1 (de) * | 2001-11-06 | 2003-04-10 | DaimlerChrysler AG, 70567 Stuttgart | Dieselpartikelfilter sowie Dieselmotor mit einem Dieselpartikelfilter |
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US20090071113A1 (en) * | 2005-06-07 | 2009-03-19 | Toyo Roki Seizo Kabushiki Kaisha | Filter element |
CN101495216B (zh) * | 2005-08-03 | 2014-04-16 | 唐纳森公司 | 用于闪蒸馏的微孔膜 |
KR20080077081A (ko) * | 2005-08-30 | 2008-08-21 | 인더스트리얼 세라믹 솔루션스, 엘엘씨 | 통합된 다층 세라믹 섬유 필터 종이 및 방법 |
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US20120304603A1 (en) * | 2010-12-08 | 2012-12-06 | E. I. Du Pont De Nemours And Company | Low elongation structures for hot gas filtration |
US9415160B2 (en) | 2012-05-21 | 2016-08-16 | Buffalo Filter Llc | Fluid filtration device and system |
US8608816B2 (en) | 2012-01-10 | 2013-12-17 | Buffalo Filter Llc | Fluid filtration device and system |
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US9072991B2 (en) * | 2012-04-24 | 2015-07-07 | Southern Felt Company, Inc. | Conductive filter media |
CN104190163A (zh) * | 2014-09-16 | 2014-12-10 | 江苏明晶布业有限公司 | 一种纳米复合聚苯硫醚针刺毡 |
RU2596455C1 (ru) * | 2015-04-15 | 2016-09-10 | федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Волгоградский государственный архитектурно-строительный университет" (ВолгГАСУ) | Нетканый материал |
US10512875B2 (en) * | 2016-01-22 | 2019-12-24 | Bha Altair, Llc | Filter and filter media having a fiber blend |
CN105999884A (zh) * | 2016-08-02 | 2016-10-12 | 安徽国能亿盛环保科技有限公司 | 一种高强度除尘滤料 |
US10814261B2 (en) * | 2017-02-21 | 2020-10-27 | Hollingsworth & Vose Company | Electret-containing filter media |
CN107789901A (zh) * | 2017-12-27 | 2018-03-13 | 广西金邦泰科技有限公司 | 一种底面带凸体的耐高温过滤布 |
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NL189176B (nl) * | 1956-07-13 | 1900-01-01 | Hisamitsu Pharmaceutical Co | Pleister op basis van een synthetische rubber. |
US2826265A (en) * | 1955-04-04 | 1958-03-11 | Ace Glass Inc | Filter element |
US2933154A (en) * | 1957-07-31 | 1960-04-19 | Du Pont | Process for filtering with polytetrafluoroethylene fibers |
US3417552A (en) * | 1967-01-06 | 1968-12-24 | Eastman Kodak Co | Filter element made of polymeric film |
BE757004A (fr) * | 1969-10-03 | 1971-03-16 | Gore & Ass | Agent d'etancheite |
US3935046A (en) * | 1972-11-06 | 1976-01-27 | Imperial Chemical Industries Limited | Non-woven fabrics |
AU8311675A (en) * | 1974-08-20 | 1977-01-20 | Gaf Corp | Extended life filter medium |
US3937860A (en) * | 1975-04-23 | 1976-02-10 | J. P. Stevens & Co., Inc. | Filtration material |
US3986851A (en) * | 1975-06-23 | 1976-10-19 | The Harshaw Chemical Company | Filter of polytetrafluoroethylene fibers |
US4031283A (en) * | 1975-11-20 | 1977-06-21 | E. I. Du Pont De Nemours And Company | Polytetrafluoroethylene felt |
DE2621592B2 (de) * | 1976-05-14 | 1979-03-29 | Bayerische Wollfilzfabriken Kg, Offermann, Zeiler, Schmid & Co, 8875 Offingen | Verfahren zum Herstellen eines Feinfilters für die Zuckerherstellung |
US4025679A (en) * | 1976-08-06 | 1977-05-24 | W. L. Gore & Associates, Inc. | Fibrillated polytetrafluoroethylene woven filter fabric |
US4257791A (en) * | 1976-12-21 | 1981-03-24 | Lydall, Inc. | Filter |
-
1980
- 1980-12-19 US US06/218,214 patent/US4324574A/en not_active Expired - Fee Related
-
1981
- 1981-12-17 AU AU78615/81A patent/AU542175B2/en not_active Ceased
- 1981-12-17 CA CA000392527A patent/CA1170026A/en not_active Expired
- 1981-12-18 JP JP56203823A patent/JPS57126655A/ja active Granted
- 1981-12-18 DK DK563481A patent/DK158797C/da not_active IP Right Cessation
- 1981-12-21 DE DE8181305993T patent/DE3169483D1/de not_active Expired
- 1981-12-21 EP EP81305993A patent/EP0055112B1/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
US4324574A (en) | 1982-04-13 |
DE3169483D1 (en) | 1985-04-25 |
EP0055112B1 (en) | 1985-03-20 |
EP0055112A1 (en) | 1982-06-30 |
AU7861581A (en) | 1982-06-24 |
AU542175B2 (en) | 1985-02-07 |
JPS57126655A (en) | 1982-08-06 |
DK158797B (da) | 1990-07-16 |
JPH0129699B2 (da) | 1989-06-13 |
CA1170026A (en) | 1984-07-03 |
DK158797C (da) | 1990-12-10 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PBP | Patent lapsed |