CA1153171A - Cellulose semipermeable hollow fibers and method for making same - Google Patents
Cellulose semipermeable hollow fibers and method for making sameInfo
- Publication number
- CA1153171A CA1153171A CA000361632A CA361632A CA1153171A CA 1153171 A CA1153171 A CA 1153171A CA 000361632 A CA000361632 A CA 000361632A CA 361632 A CA361632 A CA 361632A CA 1153171 A CA1153171 A CA 1153171A
- Authority
- CA
- Canada
- Prior art keywords
- cellulose
- fiber
- fibers
- molecular weight
- melt
- 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
- 229920002678 cellulose Polymers 0.000 title claims abstract description 98
- 239000012510 hollow fiber Substances 0.000 title claims abstract description 56
- 239000001913 cellulose Substances 0.000 title claims abstract description 55
- 238000000034 method Methods 0.000 title claims abstract description 36
- 239000000835 fiber Substances 0.000 claims abstract description 147
- 239000000203 mixture Substances 0.000 claims abstract description 109
- 229920003043 Cellulose fiber Polymers 0.000 claims abstract description 55
- 229920005862 polyol Polymers 0.000 claims abstract description 45
- 150000003077 polyols Chemical class 0.000 claims abstract description 45
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 35
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims abstract description 26
- 239000004202 carbamide Substances 0.000 claims abstract description 26
- 230000008569 process Effects 0.000 claims abstract description 25
- 229920000642 polymer Polymers 0.000 claims abstract description 18
- 239000008280 blood Substances 0.000 claims abstract description 17
- 210000004369 blood Anatomy 0.000 claims abstract description 16
- 239000000155 melt Substances 0.000 claims abstract description 13
- 238000002074 melt spinning Methods 0.000 claims abstract description 10
- 238000000108 ultra-filtration Methods 0.000 claims abstract description 7
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 claims abstract description 6
- 229910052753 mercury Inorganic materials 0.000 claims abstract description 6
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims description 53
- 229920001747 Cellulose diacetate Polymers 0.000 claims description 26
- 235000011187 glycerol Nutrition 0.000 claims description 26
- 239000004014 plasticizer Substances 0.000 claims description 24
- 229920001223 polyethylene glycol Polymers 0.000 claims description 24
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical class OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 16
- 239000002202 Polyethylene glycol Substances 0.000 claims description 15
- 239000000243 solution Substances 0.000 claims description 13
- 230000003301 hydrolyzing effect Effects 0.000 claims description 9
- 238000001035 drying Methods 0.000 claims description 8
- 229920001451 polypropylene glycol Polymers 0.000 claims description 8
- 229920008347 Cellulose acetate propionate Polymers 0.000 claims description 3
- 150000002148 esters Chemical class 0.000 claims description 3
- 239000002504 physiological saline solution Substances 0.000 claims description 3
- 239000003513 alkali Substances 0.000 claims description 2
- 238000004891 communication Methods 0.000 claims description 2
- 230000001954 sterilising effect Effects 0.000 claims description 2
- 238000004659 sterilization and disinfection Methods 0.000 claims description 2
- 238000001914 filtration Methods 0.000 claims 1
- 230000035699 permeability Effects 0.000 abstract description 24
- HXJUTPCZVOIRIF-UHFFFAOYSA-N sulfolane Chemical compound O=S1(=O)CCCC1 HXJUTPCZVOIRIF-UHFFFAOYSA-N 0.000 abstract description 11
- 238000001631 haemodialysis Methods 0.000 abstract description 9
- 230000000322 hemodialysis Effects 0.000 abstract description 9
- DDRJAANPRJIHGJ-UHFFFAOYSA-N creatinine Chemical compound CN1CC(=O)NC1=N DDRJAANPRJIHGJ-UHFFFAOYSA-N 0.000 abstract description 6
- 238000012545 processing Methods 0.000 abstract description 5
- 229940109239 creatinine Drugs 0.000 abstract description 3
- 238000001784 detoxification Methods 0.000 abstract description 3
- 238000002615 hemofiltration Methods 0.000 abstract description 3
- 239000012535 impurity Substances 0.000 abstract description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 30
- 229920002301 cellulose acetate Polymers 0.000 description 16
- 238000012360 testing method Methods 0.000 description 16
- 239000012528 membrane Substances 0.000 description 15
- 210000003734 kidney Anatomy 0.000 description 14
- 230000007062 hydrolysis Effects 0.000 description 10
- 238000006460 hydrolysis reaction Methods 0.000 description 10
- 238000004519 manufacturing process Methods 0.000 description 8
- 238000002156 mixing Methods 0.000 description 8
- 230000006196 deacetylation Effects 0.000 description 6
- 238000003381 deacetylation reaction Methods 0.000 description 6
- MTHSVFCYNBDYFN-UHFFFAOYSA-N diethylene glycol Chemical compound OCCOCCO MTHSVFCYNBDYFN-UHFFFAOYSA-N 0.000 description 6
- 239000000047 product Substances 0.000 description 6
- DQEFEBPAPFSJLV-UHFFFAOYSA-N Cellulose propionate Chemical compound CCC(=O)OCC1OC(OC(=O)CC)C(OC(=O)CC)C(OC(=O)CC)C1OC1C(OC(=O)CC)C(OC(=O)CC)C(OC(=O)CC)C(COC(=O)CC)O1 DQEFEBPAPFSJLV-UHFFFAOYSA-N 0.000 description 5
- 239000007864 aqueous solution Substances 0.000 description 5
- 229920006218 cellulose propionate Polymers 0.000 description 5
- 238000000502 dialysis Methods 0.000 description 5
- 239000012530 fluid Substances 0.000 description 5
- 239000007789 gas Substances 0.000 description 5
- -1 polyethylene Polymers 0.000 description 5
- QTBSBXVTEAMEQO-UHFFFAOYSA-M Acetate Chemical compound CC([O-])=O QTBSBXVTEAMEQO-UHFFFAOYSA-M 0.000 description 4
- 239000004698 Polyethylene Substances 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 4
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 4
- 239000011872 intimate mixture Substances 0.000 description 4
- 229920000573 polyethylene Polymers 0.000 description 4
- 238000007127 saponification reaction Methods 0.000 description 4
- DNIAPMSPPWPWGF-UHFFFAOYSA-N Propylene glycol Chemical compound CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 150000002334 glycols Chemical class 0.000 description 3
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N nitrogen Substances N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 3
- 238000003860 storage Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 229920001169 thermoplastic Polymers 0.000 description 3
- 238000012546 transfer Methods 0.000 description 3
- LCZVSXRMYJUNFX-UHFFFAOYSA-N 2-[2-(2-hydroxypropoxy)propoxy]propan-1-ol Chemical class CC(O)COC(C)COC(C)CO LCZVSXRMYJUNFX-UHFFFAOYSA-N 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- XBDQKXXYIPTUBI-UHFFFAOYSA-M Propionate Chemical compound CCC([O-])=O XBDQKXXYIPTUBI-UHFFFAOYSA-M 0.000 description 2
- 229920001727 cellulose butyrate Polymers 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000010924 continuous production Methods 0.000 description 2
- 125000004185 ester group Chemical group 0.000 description 2
- 238000004388 gamma ray sterilization Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 238000009864 tensile test Methods 0.000 description 2
- 238000005303 weighing Methods 0.000 description 2
- QAAMMQJXNSQLHE-UHFFFAOYSA-N 2-(1,1-dioxothiolan-2-yl)acetic acid Chemical compound OC(=O)CC1CCCS1(=O)=O QAAMMQJXNSQLHE-UHFFFAOYSA-N 0.000 description 1
- 229920002284 Cellulose triacetate Polymers 0.000 description 1
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- 239000005977 Ethylene Substances 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- UWHCKJMYHZGTIT-UHFFFAOYSA-N Tetraethylene glycol, Natural products OCCOCCOCCOCCO UWHCKJMYHZGTIT-UHFFFAOYSA-N 0.000 description 1
- 229930003779 Vitamin B12 Natural products 0.000 description 1
- NNLVGZFZQQXQNW-ADJNRHBOSA-N [(2r,3r,4s,5r,6s)-4,5-diacetyloxy-3-[(2s,3r,4s,5r,6r)-3,4,5-triacetyloxy-6-(acetyloxymethyl)oxan-2-yl]oxy-6-[(2r,3r,4s,5r,6s)-4,5,6-triacetyloxy-2-(acetyloxymethyl)oxan-3-yl]oxyoxan-2-yl]methyl acetate Chemical compound O([C@@H]1O[C@@H]([C@H]([C@H](OC(C)=O)[C@H]1OC(C)=O)O[C@H]1[C@@H]([C@@H](OC(C)=O)[C@H](OC(C)=O)[C@@H](COC(C)=O)O1)OC(C)=O)COC(=O)C)[C@@H]1[C@@H](COC(C)=O)O[C@@H](OC(C)=O)[C@H](OC(C)=O)[C@H]1OC(C)=O NNLVGZFZQQXQNW-ADJNRHBOSA-N 0.000 description 1
- 150000001242 acetic acid derivatives Chemical class 0.000 description 1
- 238000007605 air drying Methods 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000017531 blood circulation Effects 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000003518 caustics Substances 0.000 description 1
- 229920006217 cellulose acetate butyrate Polymers 0.000 description 1
- FDJOLVPMNUYSCM-WZHZPDAFSA-L cobalt(3+);[(2r,3s,4r,5s)-5-(5,6-dimethylbenzimidazol-1-yl)-4-hydroxy-2-(hydroxymethyl)oxolan-3-yl] [(2r)-1-[3-[(1r,2r,3r,4z,7s,9z,12s,13s,14z,17s,18s,19r)-2,13,18-tris(2-amino-2-oxoethyl)-7,12,17-tris(3-amino-3-oxopropyl)-3,5,8,8,13,15,18,19-octamethyl-2 Chemical compound [Co+3].N#[C-].N([C@@H]([C@]1(C)[N-]\C([C@H]([C@@]1(CC(N)=O)C)CCC(N)=O)=C(\C)/C1=N/C([C@H]([C@@]1(CC(N)=O)C)CCC(N)=O)=C\C1=N\C([C@H](C1(C)C)CCC(N)=O)=C/1C)[C@@H]2CC(N)=O)=C\1[C@]2(C)CCC(=O)NC[C@@H](C)OP([O-])(=O)O[C@H]1[C@@H](O)[C@@H](N2C3=CC(C)=C(C)C=C3N=C2)O[C@@H]1CO FDJOLVPMNUYSCM-WZHZPDAFSA-L 0.000 description 1
- 229940000425 combination drug Drugs 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000002844 continuous effect Effects 0.000 description 1
- 230000000850 deacetylating effect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 150000005690 diesters Chemical class 0.000 description 1
- SZXQTJUDPRGNJN-UHFFFAOYSA-N dipropylene glycol Chemical compound OCCCOCCCO SZXQTJUDPRGNJN-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 230000005251 gamma ray Effects 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000009533 lab test Methods 0.000 description 1
- 238000002386 leaching Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000003472 neutralizing effect Effects 0.000 description 1
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920000151 polyglycol Polymers 0.000 description 1
- 239000010695 polyglycol Substances 0.000 description 1
- 229920005594 polymer fiber Polymers 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 238000004382 potting Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- CMDGQTVYVAKDNA-UHFFFAOYSA-N propane-1,2,3-triol;hydrate Chemical compound O.OCC(O)CO CMDGQTVYVAKDNA-UHFFFAOYSA-N 0.000 description 1
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 1
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 1
- 230000008707 rearrangement Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000004627 regenerated cellulose Substances 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 238000009987 spinning Methods 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
- ZIBGPFATKBEMQZ-UHFFFAOYSA-N triethylene glycol Chemical compound OCCOCCOCCO ZIBGPFATKBEMQZ-UHFFFAOYSA-N 0.000 description 1
- 229940045136 urea Drugs 0.000 description 1
- 238000001291 vacuum drying Methods 0.000 description 1
- 239000011715 vitamin B12 Substances 0.000 description 1
- 235000019163 vitamin B12 Nutrition 0.000 description 1
Classifications
-
- 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
- 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
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Textile Engineering (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
- Artificial Filaments (AREA)
- External Artificial Organs (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US10420779A | 1979-12-17 | 1979-12-17 | |
| US104,207 | 1979-12-17 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1153171A true CA1153171A (en) | 1983-09-06 |
Family
ID=22299216
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000361632A Expired CA1153171A (en) | 1979-12-17 | 1980-10-06 | Cellulose semipermeable hollow fibers and method for making same |
Country Status (13)
| Country | Link |
|---|---|
| JP (1) | JPH0778288B2 (de) |
| AU (1) | AU543028B2 (de) |
| BE (1) | BE886354A (de) |
| CA (1) | CA1153171A (de) |
| CH (1) | CH650033A5 (de) |
| DD (2) | DD154068A5 (de) |
| DE (1) | DE3044435C3 (de) |
| ES (2) | ES497154A0 (de) |
| FR (1) | FR2473340B1 (de) |
| GB (1) | GB2065546B (de) |
| IT (1) | IT1146243B (de) |
| NL (1) | NL192269C (de) |
| SE (1) | SE449376B (de) |
Families Citing this family (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3042110A1 (de) * | 1980-11-07 | 1982-06-16 | Akzo Gmbh, 5600 Wuppertal | Mikroporoese cellulosemembran |
| DE3129064A1 (de) * | 1981-07-23 | 1983-02-10 | Akzo Gmbh, 5600 Wuppertal | Verfahren und vorrichtung zur blutoxygenation |
| US4425129A (en) * | 1981-12-07 | 1984-01-10 | Colgate-Palmolive Company | Diaper with cushioned elastic leg hold edges |
| DE3317037A1 (de) * | 1983-05-10 | 1984-11-15 | Hoechst Ag, 6230 Frankfurt | Membran aus regenerierter cellulose mit verbesserrten diffusionseigenschaften und verfahren zur herstellung |
| JPS605202A (ja) * | 1983-06-21 | 1985-01-11 | Teijin Ltd | 多孔性セルロ−スエステル系中空繊維およびその製造方法 |
| JPS6036061A (ja) * | 1983-08-08 | 1985-02-25 | 鐘淵化学工業株式会社 | 血液浄化装置 |
| JPS6045359A (ja) * | 1983-08-19 | 1985-03-11 | 鐘淵化学工業株式会社 | 血液浄化器 |
| JPH0653164B2 (ja) * | 1986-06-10 | 1994-07-20 | 東洋紡績株式会社 | セルロ−スエステル系中空糸状血漿分離膜 |
| DE3842822A1 (de) * | 1988-12-20 | 1990-07-05 | Akzo Gmbh | Biocompatible dialysemembran aus einem gemischten polysaccharidester |
| DE4038247A1 (de) * | 1990-11-30 | 1992-06-04 | Akzo Gmbh | Cellulosedialysehohlfaden |
| ATE136808T1 (de) * | 1992-06-25 | 1996-05-15 | Saechsische Kunstseiden Gmbh | Verfahren zur erhöhung der form- und spinnstabilität von kapillarhohlmembranen |
| JPH07779A (ja) * | 1993-02-04 | 1995-01-06 | Mitsubishi Rayon Co Ltd | 炭酸ガス溶解方法及び装置 |
| WO2012160217A1 (de) | 2011-05-26 | 2012-11-29 | Biocell Gesellschaft Für Biotechnologie Mbh | Funktionalisierte wundauflage |
| CN110685021B (zh) * | 2019-09-26 | 2021-06-04 | 湖北新阳特种纤维股份有限公司 | 纺织用二醋酸纤维素纤维的制备方法 |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3423491A (en) * | 1964-09-02 | 1969-01-21 | Dow Chemical Co | Permselective hollow fibers and method of making |
| US3532527A (en) * | 1966-11-04 | 1970-10-06 | Dow Chemical Co | Permeable separatory membranes |
| US3494780A (en) * | 1966-11-04 | 1970-02-10 | Dow Chemical Co | Method for enhancing permeability of separatory membranes |
| GB1481064A (en) * | 1973-08-30 | 1977-07-27 | Teijin Ltd | Membrane apparatus for treating fluids |
| JPS5644161B2 (de) * | 1974-02-21 | 1981-10-17 | ||
| JPS5644162B2 (de) * | 1974-02-22 | 1981-10-17 | ||
| JPS5155417A (ja) * | 1974-11-09 | 1976-05-15 | Teijin Ltd | Seruroosuaseteetochukushino seizohoho |
| JPS52144416A (en) * | 1976-05-25 | 1977-12-01 | Teijin Ltd | Hollow cellulose fibers |
| AU519458B2 (en) * | 1977-07-05 | 1981-12-03 | Cordis Dow Corporation | Cellulose acetate hollow fibres |
| DE2967152D1 (en) * | 1978-08-22 | 1984-09-06 | Mitsubishi Rayon Co | Process for manufacturing regenerated cellulose hollow fiber |
-
1980
- 1980-10-06 CA CA000361632A patent/CA1153171A/en not_active Expired
- 1980-10-15 AU AU63405/80A patent/AU543028B2/en not_active Ceased
- 1980-11-03 IT IT50066/80A patent/IT1146243B/it active
- 1980-11-20 FR FR8024644A patent/FR2473340B1/fr not_active Expired
- 1980-11-26 DE DE3044435A patent/DE3044435C3/de not_active Expired - Lifetime
- 1980-11-26 ES ES497154A patent/ES497154A0/es active Granted
- 1980-11-26 BE BE0/202937A patent/BE886354A/fr not_active IP Right Cessation
- 1980-11-27 JP JP55167358A patent/JPH0778288B2/ja not_active Expired - Lifetime
- 1980-11-28 NL NL8006491A patent/NL192269C/nl not_active IP Right Cessation
- 1980-12-15 DD DD80226098A patent/DD154068A5/de unknown
- 1980-12-15 DD DD80233554A patent/DD200311A5/de unknown
- 1980-12-16 SE SE8008813A patent/SE449376B/sv not_active IP Right Cessation
- 1980-12-16 CH CH9268/80A patent/CH650033A5/fr not_active IP Right Cessation
- 1980-12-16 GB GB8040205A patent/GB2065546B/en not_active Expired
-
1981
- 1981-11-30 ES ES81507576A patent/ES8301643A1/es not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| NL8006491A (nl) | 1981-07-16 |
| DE3044435C3 (de) | 1998-08-13 |
| SE449376B (sv) | 1987-04-27 |
| AU6340580A (en) | 1981-06-25 |
| DD200311A5 (de) | 1983-04-13 |
| NL192269C (nl) | 1997-04-03 |
| DE3044435A1 (de) | 1981-06-25 |
| BE886354A (fr) | 1981-05-26 |
| JPH0778288B2 (ja) | 1995-08-23 |
| GB2065546B (en) | 1985-02-13 |
| DD154068A5 (de) | 1982-02-24 |
| IT8050066A0 (it) | 1980-11-03 |
| ES8202873A1 (es) | 1982-02-16 |
| CH650033A5 (fr) | 1985-06-28 |
| AU543028B2 (en) | 1985-03-28 |
| DE3044435C2 (de) | 1992-05-27 |
| NL192269B (nl) | 1996-12-02 |
| SE8008813L (sv) | 1981-06-18 |
| FR2473340A1 (fr) | 1981-07-17 |
| FR2473340B1 (fr) | 1988-08-05 |
| ES497154A0 (es) | 1982-02-16 |
| JPS5691006A (en) | 1981-07-23 |
| ES507576A0 (es) | 1982-12-16 |
| GB2065546A (en) | 1981-07-01 |
| IT1146243B (it) | 1986-11-12 |
| ES8301643A1 (es) | 1982-12-16 |
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