GB1566581A - Hollow fibres and methods of manufacturing such fibres - Google Patents
Hollow fibres and methods of manufacturing such fibres Download PDFInfo
- Publication number
- GB1566581A GB1566581A GB53772/76A GB5377276A GB1566581A GB 1566581 A GB1566581 A GB 1566581A GB 53772/76 A GB53772/76 A GB 53772/76A GB 5377276 A GB5377276 A GB 5377276A GB 1566581 A GB1566581 A GB 1566581A
- Authority
- GB
- United Kingdom
- Prior art keywords
- hollow fibre
- manufacturing
- hereinbefore described
- fibre
- hollow
- 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
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- 235000019691 monocalcium phosphate Nutrition 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 235000019799 monosodium phosphate Nutrition 0.000 description 1
- 229910000403 monosodium phosphate Inorganic materials 0.000 description 1
- WHQSYGRFZMUQGQ-UHFFFAOYSA-N n,n-dimethylformamide;hydrate Chemical compound O.CN(C)C=O WHQSYGRFZMUQGQ-UHFFFAOYSA-N 0.000 description 1
- WQEPLUUGTLDZJY-UHFFFAOYSA-N n-Pentadecanoic acid Natural products CCCCCCCCCCCCCCC(O)=O WQEPLUUGTLDZJY-UHFFFAOYSA-N 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- LYGJENNIWJXYER-UHFFFAOYSA-N nitromethane Chemical compound C[N+]([O-])=O LYGJENNIWJXYER-UHFFFAOYSA-N 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 235000006408 oxalic acid Nutrition 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- RAFRTSDUWORDLA-UHFFFAOYSA-N phenyl 3-chloropropanoate Chemical compound ClCCC(=O)OC1=CC=CC=C1 RAFRTSDUWORDLA-UHFFFAOYSA-N 0.000 description 1
- NMHMNPHRMNGLLB-UHFFFAOYSA-N phloretic acid Chemical compound OC(=O)CCC1=CC=C(O)C=C1 NMHMNPHRMNGLLB-UHFFFAOYSA-N 0.000 description 1
- 108010054442 polyalanine Proteins 0.000 description 1
- 229920000139 polyethylene terephthalate Polymers 0.000 description 1
- 239000005020 polyethylene terephthalate Substances 0.000 description 1
- 229920000307 polymer substrate Polymers 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 239000011736 potassium bicarbonate Substances 0.000 description 1
- 235000015497 potassium bicarbonate Nutrition 0.000 description 1
- 229910000028 potassium bicarbonate Inorganic materials 0.000 description 1
- CHKVPAROMQMJNQ-UHFFFAOYSA-M potassium bisulfate Chemical compound [K+].OS([O-])(=O)=O CHKVPAROMQMJNQ-UHFFFAOYSA-M 0.000 description 1
- VKJKEPKFPUWCAS-UHFFFAOYSA-M potassium chlorate Chemical compound [K+].[O-]Cl(=O)=O VKJKEPKFPUWCAS-UHFFFAOYSA-M 0.000 description 1
- RPDAUEIUDPHABB-UHFFFAOYSA-N potassium ethoxide Chemical compound [K+].CC[O-] RPDAUEIUDPHABB-UHFFFAOYSA-N 0.000 description 1
- TYJJADVDDVDEDZ-UHFFFAOYSA-M potassium hydrogencarbonate Chemical compound [K+].OC([O-])=O TYJJADVDDVDEDZ-UHFFFAOYSA-M 0.000 description 1
- 239000004323 potassium nitrate Substances 0.000 description 1
- 235000010333 potassium nitrate Nutrition 0.000 description 1
- 239000004304 potassium nitrite Substances 0.000 description 1
- 235000010289 potassium nitrite Nutrition 0.000 description 1
- 229940116357 potassium thiocyanate Drugs 0.000 description 1
- ABHHITAVUODQNA-UHFFFAOYSA-M potassium;benzenesulfonate Chemical compound [K+].[O-]S(=O)(=O)C1=CC=CC=C1 ABHHITAVUODQNA-UHFFFAOYSA-M 0.000 description 1
- ZGJADVGJIVEEGF-UHFFFAOYSA-M potassium;phenoxide Chemical compound [K+].[O-]C1=CC=CC=C1 ZGJADVGJIVEEGF-UHFFFAOYSA-M 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 235000019260 propionic acid Nutrition 0.000 description 1
- 229940107700 pyruvic acid Drugs 0.000 description 1
- 238000004445 quantitative analysis Methods 0.000 description 1
- IUVKMZGDUIUOCP-BTNSXGMBSA-N quinbolone Chemical compound O([C@H]1CC[C@H]2[C@H]3[C@@H]([C@]4(C=CC(=O)C=C4CC3)C)CC[C@@]21C)C1=CCCC1 IUVKMZGDUIUOCP-BTNSXGMBSA-N 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 238000009938 salting Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- AJPJDKMHJJGVTQ-UHFFFAOYSA-M sodium dihydrogen phosphate Chemical compound [Na+].OP(O)([O-])=O AJPJDKMHJJGVTQ-UHFFFAOYSA-M 0.000 description 1
- QDRKDTQENPPHOJ-UHFFFAOYSA-N sodium ethoxide Chemical compound [Na+].CC[O-] QDRKDTQENPPHOJ-UHFFFAOYSA-N 0.000 description 1
- 239000004317 sodium nitrate Substances 0.000 description 1
- 235000010344 sodium nitrate Nutrition 0.000 description 1
- 235000010288 sodium nitrite Nutrition 0.000 description 1
- 229910052938 sodium sulfate Inorganic materials 0.000 description 1
- 235000011152 sodium sulphate Nutrition 0.000 description 1
- 235000010265 sodium sulphite Nutrition 0.000 description 1
- VGTPCRGMBIAPIM-UHFFFAOYSA-M sodium thiocyanate Chemical compound [Na+].[S-]C#N VGTPCRGMBIAPIM-UHFFFAOYSA-M 0.000 description 1
- KVCGISUBCHHTDD-UHFFFAOYSA-M sodium;4-methylbenzenesulfonate Chemical compound [Na+].CC1=CC=C(S([O-])(=O)=O)C=C1 KVCGISUBCHHTDD-UHFFFAOYSA-M 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- HXJUTPCZVOIRIF-UHFFFAOYSA-N sulfolane Chemical compound O=S1(=O)CCCC1 HXJUTPCZVOIRIF-UHFFFAOYSA-N 0.000 description 1
- 229910021653 sulphate ion Inorganic materials 0.000 description 1
- 229920001576 syndiotactic polymer Polymers 0.000 description 1
- 239000011975 tartaric acid Substances 0.000 description 1
- 235000002906 tartaric acid Nutrition 0.000 description 1
- 229920006027 ternary co-polymer Polymers 0.000 description 1
- TUNFSRHWOTWDNC-HKGQFRNVSA-N tetradecanoic acid Chemical compound CCCCCCCCCCCCC[14C](O)=O TUNFSRHWOTWDNC-HKGQFRNVSA-N 0.000 description 1
- QORWJWZARLRLPR-UHFFFAOYSA-H tricalcium bis(phosphate) Chemical compound [Ca+2].[Ca+2].[Ca+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O QORWJWZARLRLPR-UHFFFAOYSA-H 0.000 description 1
- XWKBMOUUGHARTI-UHFFFAOYSA-N tricalcium;diphosphite Chemical compound [Ca+2].[Ca+2].[Ca+2].[O-]P([O-])[O-].[O-]P([O-])[O-] XWKBMOUUGHARTI-UHFFFAOYSA-N 0.000 description 1
- UBOXGVDOUJQMTN-UHFFFAOYSA-N trichloroethylene Natural products ClCC(Cl)Cl UBOXGVDOUJQMTN-UHFFFAOYSA-N 0.000 description 1
- 229940005605 valeric acid Drugs 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 229940045999 vitamin b 12 Drugs 0.000 description 1
- 239000011592 zinc chloride Substances 0.000 description 1
- 235000005074 zinc chloride Nutrition 0.000 description 1
- NWONKYPBYAMBJT-UHFFFAOYSA-L zinc sulfate Chemical compound [Zn+2].[O-]S([O-])(=O)=O NWONKYPBYAMBJT-UHFFFAOYSA-L 0.000 description 1
- 239000011686 zinc sulphate Substances 0.000 description 1
- 235000009529 zinc sulphate Nutrition 0.000 description 1
Classifications
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/24—Formation of filaments, threads, or the like with a hollow structure; Spinnerette packs therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D69/00—Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor
- B01D69/08—Hollow fibre membranes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D71/00—Semi-permeable membranes for separation processes or apparatus characterised by the material; Manufacturing processes specially adapted therefor
- B01D71/06—Organic material
- B01D71/08—Polysaccharides
- B01D71/10—Cellulose; Modified cellulose
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D71/00—Semi-permeable membranes for separation processes or apparatus characterised by the material; Manufacturing processes specially adapted therefor
- B01D71/06—Organic material
- B01D71/08—Polysaccharides
- B01D71/12—Cellulose derivatives
- B01D71/14—Esters of organic acids
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D71/00—Semi-permeable membranes for separation processes or apparatus characterised by the material; Manufacturing processes specially adapted therefor
- B01D71/06—Organic material
- B01D71/40—Polymers of unsaturated acids or derivatives thereof, e.g. salts, amides, imides, nitriles, anhydrides, esters
- B01D71/401—Polymers based on the polymerisation of acrylic acid, e.g. polyacrylate
- B01D71/4011—Polymethylmethacrylate
-
- 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
- Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
- Y10T428/2913—Rod, strand, filament or fiber
- Y10T428/2973—Particular cross section
- Y10T428/2975—Tubular or cellular
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Textile Engineering (AREA)
- Artificial Filaments (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15631675A JPS5285525A (en) | 1975-12-29 | 1975-12-29 | Production of hollow fibers |
| JP8157076A JPS536627A (en) | 1976-07-08 | 1976-07-08 | Hollow fibers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1566581A true GB1566581A (en) | 1980-05-08 |
Family
ID=26422589
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB53772/76A Expired GB1566581A (en) | 1975-12-29 | 1976-12-23 | Hollow fibres and methods of manufacturing such fibres |
Country Status (3)
| Country | Link |
|---|---|
| US (2) | US4322381A (enExample) |
| FR (1) | FR2337212A1 (enExample) |
| GB (1) | GB1566581A (enExample) |
Families Citing this family (51)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2380052A1 (fr) * | 1977-02-11 | 1978-09-08 | Akzo Nv | Membrane de dialyse pour l'hemodialyse |
| US4385017A (en) * | 1977-06-30 | 1983-05-24 | Nippon Zeon Co., Ltd. | Method of manufacturing hollow fiber |
| JPS54101917A (en) * | 1978-01-27 | 1979-08-10 | Teijin Ltd | Hollow fibers and their manufacture |
| DE2967152D1 (en) * | 1978-08-22 | 1984-09-06 | Mitsubishi Rayon Co | Process for manufacturing regenerated cellulose hollow fiber |
| LU81734A1 (de) * | 1978-10-02 | 1980-01-24 | Akzo Nv | Dialysemembranhohlfaden mit verbesserter austauschflaeche |
| DE2848601C2 (de) * | 1978-10-02 | 1990-09-13 | Akzo Gmbh, 5600 Wuppertal | Dialysemembranhohlfaden mit stabilisierter Wanddicke |
| NL7907214A (nl) * | 1978-10-02 | 1980-06-25 | Akzo Nv | Dunwandige holle-vezel-membraan voor dialyse. |
| EP0023664B1 (en) * | 1979-07-26 | 1985-12-04 | Teijin Limited | Process for producing the same of hollow water-absorbing polyester filaments |
| DE3006880C2 (de) * | 1980-02-23 | 1986-10-09 | Akzo Gmbh, 5600 Wuppertal | Plasmaphoresemembran |
| JPS56144237A (en) * | 1980-04-07 | 1981-11-10 | Teijin Ltd | Polyester type fiber woven and knitted fabric |
| DE3138525A1 (de) * | 1981-09-28 | 1983-04-14 | Akzo Gmbh, 5600 Wuppertal | Verfahren zur herstellung einer asymmetrischen hohlfadenmembran aus polyamid |
| IT1144925B (it) * | 1981-10-08 | 1986-10-29 | Anic Spa | Fibre cave di chitosano e procedimento per il loro ottenimento |
| US4511711A (en) * | 1982-02-10 | 1985-04-16 | Sumitomo Chemical Company, Limited | Process for producing semipermeable membrane |
| DE3205289C2 (de) * | 1982-02-15 | 1984-10-31 | Akzo Gmbh, 5600 Wuppertal | Verfahren zur Herstellung von porösen Körpern mit einstellbarem Gesamtporenvolumen, einstellbarer Porengröße und einstellbarer Porenwandung |
| US4681713A (en) * | 1984-03-15 | 1987-07-21 | Toyo Boseki Kabushiki Kaisha | Method of making a hollow fiber membrane for dialysis |
| US4587168A (en) * | 1984-04-05 | 1986-05-06 | Toyo Boseki Kabushiki Kaisha | Hollow fiber membrane for dialysis |
| US4744932A (en) * | 1985-05-31 | 1988-05-17 | Celanese Corporation | Process for forming a skinless hollow fiber of a cellulose ester |
| US4681605A (en) * | 1985-06-27 | 1987-07-21 | A/G Technology Corporation | Anisotropic membranes for gas separation |
| US4915886A (en) * | 1987-04-27 | 1990-04-10 | Cuno, Incorporated | Method of manufacturing nylon microporous hollow fiber membrane |
| US4820460A (en) * | 1987-04-27 | 1989-04-11 | Cuno, Incorporated | Method of manufacturing a hollow porous fiber |
| CA1264514A (en) * | 1987-10-05 | 1990-01-23 | Srinivasa Sourirajan | Method of manufacturing a reverse osmosis membrane of cellulosic material |
| DE3853366T2 (de) * | 1987-12-02 | 1995-07-27 | Japan As Represented By Minist | Hydrolysierte Membran und Verfahren zu deren Herstellung. |
| US4867934A (en) * | 1987-12-23 | 1989-09-19 | Cuno, Inc. | Production of hollow nylon fibers |
| GB2214101B (en) * | 1988-01-14 | 1991-05-29 | Chainings Ltd | Filter apparatus for filtering a liquid |
| JPH0263531A (ja) * | 1988-05-30 | 1990-03-02 | Terumo Corp | 中空糸膜の製造方法 |
| WO1990006801A1 (en) * | 1988-12-22 | 1990-06-28 | Cuno, Incorporated | Hollow fiber vertical quench bath |
| DE4038247A1 (de) * | 1990-11-30 | 1992-06-04 | Akzo Gmbh | Cellulosedialysehohlfaden |
| US5096585A (en) * | 1991-01-28 | 1992-03-17 | W. R. Grace & Co.-Conn. | Process for preparing protein non-adsorptive microporous polysulfone membranes |
| JP2568043B2 (ja) * | 1991-05-21 | 1996-12-25 | ブラウン・ユニバーシテイ・リサーチ・フアウンデーシヨン | 中空繊維を形成するための装置と該繊維 |
| US5277857A (en) * | 1992-01-17 | 1994-01-11 | Viskase Corporation | Method of making a cellulose food casing |
| USH1592H (en) * | 1992-01-17 | 1996-09-03 | Viskase Corporation | Cellulosic food casing |
| US5451364A (en) * | 1992-01-17 | 1995-09-19 | Viskase Corporation | Cellulose food casing manufacturing method |
| US5298206A (en) * | 1992-02-04 | 1994-03-29 | W. R. Grace & Co.-Conn. | Method and apparatus for casting hollow fiber membranes |
| MY115308A (en) * | 1993-05-24 | 2003-05-31 | Tencel Ltd | Spinning cell |
| US5433852A (en) * | 1993-09-02 | 1995-07-18 | Industrial Technology Research Institute | Method for modifying PVC separation membranes |
| US5603884A (en) * | 1994-11-18 | 1997-02-18 | Viskase Corporation | Reinforced cellulosic film |
| CA2165221C (en) * | 1994-12-16 | 2003-09-23 | Kazuhisa Shibata | Module for blood purification, blood purification membrane and its production |
| US5962005A (en) * | 1997-04-17 | 1999-10-05 | Rengo Co., Ltd | Transparent cellulose hydrogel and production process thereof |
| EP1029584A4 (en) * | 1998-08-11 | 2005-11-16 | Daicel Chem | SEMIPERMEABLE MEMBRANE FROM ACETATE CELLULOSE AND METHOD FOR THE PRODUCTION THEREOF |
| US6409024B1 (en) * | 1998-08-27 | 2002-06-25 | Toray Industries, Inc. | Blood processing device |
| US6616912B2 (en) | 2001-01-05 | 2003-09-09 | Spectrum Laboratories, Inc. | Bi-component microporous hollow fiber membrane structure for in vivo propagation of cells |
| US6858141B2 (en) * | 2001-08-30 | 2005-02-22 | Council Of Scientific & Industrial Research (Csir) | Process for the preparation of ultrafiltration membranes of polyacrylonitrile, using malic acid as an additive |
| US7267170B2 (en) * | 2005-01-31 | 2007-09-11 | Halliburton Energy Services, Inc. | Self-degrading fibers and associated methods of use and manufacture |
| US20080009423A1 (en) * | 2005-01-31 | 2008-01-10 | Halliburton Energy Services, Inc. | Self-degrading fibers and associated methods of use and manufacture |
| US8377172B2 (en) * | 2009-06-11 | 2013-02-19 | Georgia Tech Research Corporation | Fiber sorbents |
| CN102861518B (zh) * | 2011-07-05 | 2014-11-26 | 北京金通量科技有限公司 | 高聚合度聚氯乙烯中空纤维超滤膜的制备方法 |
| GB2533280A (en) * | 2014-12-09 | 2016-06-22 | Ozone Purification Ltd | Electrolyzed water composition |
| CN107530645B (zh) * | 2015-04-28 | 2020-10-27 | 东丽株式会社 | 复合中空纤维膜及其制造方法 |
| US20210156051A1 (en) * | 2019-11-21 | 2021-05-27 | The Regents Of The University Of California | Coaxial cellulose-based aerogel fibers |
| CN114870643B (zh) * | 2022-04-27 | 2023-06-16 | 中科南京绿色制造产业创新研究院 | 一种聚合物中空纤维膜及其制备方法和应用 |
| WO2025171011A1 (en) * | 2024-02-09 | 2025-08-14 | Moleaer, Inc. | Nanobubbles for preparation of spun fibrous materials |
Family Cites Families (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| USRE19329E (en) | 1934-09-25 | Process of and apparatus for manu | ||
| US1864006A (en) * | 1928-01-25 | 1932-06-21 | Weingand Richard | Apparatus for manufacturing seamless flexible tubes from cellulose solutions |
| US2267217A (en) * | 1939-10-07 | 1941-12-23 | Sylvania Ind Corp | Article of manufacture and process of making the same |
| US3441142A (en) * | 1966-07-21 | 1969-04-29 | Dow Chemical Co | Nonthrombogenic plastic membranes |
| US3642773A (en) * | 1967-12-29 | 1972-02-15 | Mc Donnell Douglas Corp | Modified cellulose ester semipermeable membrane |
| US3527853A (en) * | 1968-02-29 | 1970-09-08 | Eastman Kodak Co | Process for manufacturing semipermeable cellulose acetate membranes suitable for desalination |
| FR1586563A (enExample) * | 1968-10-29 | 1970-02-20 | ||
| US3554379A (en) * | 1969-06-10 | 1971-01-12 | Du Pont | Desalination apparatus and process of manufacture using improved, nitrogenous membranes |
| US3724672A (en) * | 1970-07-27 | 1973-04-03 | R Leonard | Asymmetric hollow fiber membranes and method of fabrication |
| US3888771A (en) * | 1972-06-02 | 1975-06-10 | Asahi Chemical Ind | Hollow fibers of cuprammonium cellulose and a process of the manufacture of same |
| FR2199014B1 (enExample) * | 1972-09-12 | 1975-03-14 | Rhone Poulenc Ind | |
| US3975478A (en) * | 1974-08-14 | 1976-08-17 | Monsanto Company | Method for producing highly permeable acrylic hollow fibers |
| US4127625A (en) * | 1975-03-27 | 1978-11-28 | Daicel Ltd. | Process for preparing hollow fiber having selective gas permeability |
| US4035459A (en) * | 1975-05-01 | 1977-07-12 | Chemical Systems, Inc. | Process for spinning dry-fiber cellulose acetate hollow fiber membranes |
| US4086418A (en) * | 1976-02-27 | 1978-04-25 | International Telephone And Telegraph Corporation | Process for producing a regenerated hollow cellulosic fiber |
-
1976
- 1976-12-23 GB GB53772/76A patent/GB1566581A/en not_active Expired
- 1976-12-29 FR FR7639499A patent/FR2337212A1/fr active Granted
-
1980
- 1980-12-08 US US06/213,874 patent/US4322381A/en not_active Expired - Lifetime
- 1980-12-08 US US06/213,877 patent/US4323627A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| FR2337212A1 (fr) | 1977-07-29 |
| US4323627A (en) | 1982-04-06 |
| FR2337212B1 (enExample) | 1983-02-25 |
| US4322381A (en) | 1982-03-30 |
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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 |