DK0442557T3 - Flerlagsmembran og fremgangsmåde til fremstilling deraf - Google Patents
Flerlagsmembran og fremgangsmåde til fremstilling derafInfo
- Publication number
- DK0442557T3 DK0442557T3 DK91200181.5T DK91200181T DK0442557T3 DK 0442557 T3 DK0442557 T3 DK 0442557T3 DK 91200181 T DK91200181 T DK 91200181T DK 0442557 T3 DK0442557 T3 DK 0442557T3
- Authority
- DK
- Denmark
- Prior art keywords
- layer
- polyvinylalcohol
- preparation
- multilayer membrane
- polyvinylidenedifluoride
- Prior art date
Links
- 239000012528 membrane Substances 0.000 title abstract 2
- 239000004372 Polyvinyl alcohol Substances 0.000 abstract 2
- 229920002451 polyvinyl alcohol Polymers 0.000 abstract 2
- 235000019422 polyvinyl alcohol Nutrition 0.000 abstract 2
- 239000004697 Polyetherimide Substances 0.000 abstract 1
- 239000004642 Polyimide Substances 0.000 abstract 1
- 239000004721 Polyphenylene oxide Substances 0.000 abstract 1
- 238000002441 X-ray diffraction Methods 0.000 abstract 1
- 239000003365 glass fiber Substances 0.000 abstract 1
- 229920002492 poly(sulfone) Polymers 0.000 abstract 1
- 229920002239 polyacrylonitrile Polymers 0.000 abstract 1
- 229920000570 polyether Polymers 0.000 abstract 1
- 229920001601 polyetherimide Polymers 0.000 abstract 1
- 229920001721 polyimide Polymers 0.000 abstract 1
- 229920002635 polyurethane Polymers 0.000 abstract 1
- 239000004814 polyurethane Substances 0.000 abstract 1
- 229920002981 polyvinylidene fluoride Polymers 0.000 abstract 1
- 239000011148 porous material Substances 0.000 abstract 1
- 230000011514 reflex Effects 0.000 abstract 1
- 125000001174 sulfone group Chemical group 0.000 abstract 1
Classifications
-
- 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
- B01D69/12—Composite membranes; Ultra-thin membranes
- B01D69/1216—Three or more layers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D67/00—Processes specially adapted for manufacturing semi-permeable membranes for separation processes or apparatus
- B01D67/0002—Organic membrane manufacture
- B01D67/0009—Organic membrane manufacture by phase separation, sol-gel transition, evaporation or solvent quenching
- B01D67/0011—Casting solutions therefor
-
- 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
- B01D71/38—Polyalkenylalcohols; Polyalkenylesters; Polyalkenylethers; Polyalkenylaldehydes; Polyalkenylketones; Polyalkenylacetals; Polyalkenylketals
- B01D71/381—Polyvinylalcohol
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2323/00—Details relating to membrane preparation
- B01D2323/08—Specific temperatures applied
- B01D2323/081—Heating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2323/00—Details relating to membrane preparation
- B01D2323/12—Specific ratios of components used
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2323/00—Details relating to membrane preparation
- B01D2323/38—Graft polymerization
- B01D2323/385—Graft polymerization involving radiation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2325/00—Details relating to properties of membranes
- B01D2325/04—Characteristic thickness
-
- 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
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S210/00—Liquid purification or separation
- Y10S210/902—Materials removed
- Y10S210/908—Organic
-
- 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
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S55/00—Gas separation
- Y10S55/05—Methods of making filter
-
- 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
- Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
- Y10T428/24942—Structurally defined web or sheet [e.g., overall dimension, etc.] including components having same physical characteristic in differing degree
- Y10T428/2495—Thickness [relative or absolute]
- Y10T428/24967—Absolute thicknesses specified
-
- 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
- Y10T428/249921—Web or sheet containing structurally defined element or component
- Y10T428/249953—Composite having voids in a component [e.g., porous, cellular, etc.]
- Y10T428/249981—Plural void-containing components
-
- 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
- Y10T428/249921—Web or sheet containing structurally defined element or component
- Y10T428/249953—Composite having voids in a component [e.g., porous, cellular, etc.]
- Y10T428/249987—With nonvoid component of specified composition
- Y10T428/249991—Synthetic resin or natural rubbers
-
- 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.]
- Y10T442/30—Woven fabric [i.e., woven strand or strip material]
- Y10T442/3854—Woven fabric with a preformed polymeric film or sheet
-
- 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.]
- Y10T442/30—Woven fabric [i.e., woven strand or strip material]
- Y10T442/3854—Woven fabric with a preformed polymeric film or sheet
- Y10T442/387—Vinyl polymer or copolymer sheet or film [e.g., polyvinyl chloride, polyvinylidene chloride, polyvinyl acetate, etc.]
-
- 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.]
- Y10T442/30—Woven fabric [i.e., woven strand or strip material]
- Y10T442/3854—Woven fabric with a preformed polymeric film or sheet
- Y10T442/3878—Fluorinated olefin polymer or copolymer sheet or film [e.g., Teflon@, etc.]
-
- 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.]
- Y10T442/30—Woven fabric [i.e., woven strand or strip material]
- Y10T442/3854—Woven fabric with a preformed polymeric film or sheet
- Y10T442/3902—Polyimide sheet or film
-
- 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.]
- Y10T442/60—Nonwoven fabric [i.e., nonwoven strand or fiber material]
- Y10T442/674—Nonwoven fabric with a preformed polymeric film or sheet
-
- 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.]
- Y10T442/60—Nonwoven fabric [i.e., nonwoven strand or fiber material]
- Y10T442/674—Nonwoven fabric with a preformed polymeric film or sheet
- Y10T442/676—Vinyl polymer or copolymer sheet or film [e.g., polyvinyl chloride, polyvinylidene chloride, polyvinyl acetate, etc.]
-
- 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.]
- Y10T442/60—Nonwoven fabric [i.e., nonwoven strand or fiber material]
- Y10T442/674—Nonwoven fabric with a preformed polymeric film or sheet
- Y10T442/677—Fluorinated olefin polymer or copolymer sheet or film [e.g., TeflonR, etc.]
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Dispersion Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
- Laminated Bodies (AREA)
- Piezo-Electric Transducers For Audible Bands (AREA)
- Prostheses (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4004153A DE4004153C1 (en) | 1990-02-10 | 1990-02-10 | Multilayered membrane with high sepn. performance - comprises carrier layer of polyamide, polyvinylidene-di:fluoride polyester or glass fibres porous supply and PVA sepn. layer |
Publications (1)
Publication Number | Publication Date |
---|---|
DK0442557T3 true DK0442557T3 (da) | 1994-11-21 |
Family
ID=6399908
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DK91200181.5T DK0442557T3 (da) | 1990-02-10 | 1991-01-30 | Flerlagsmembran og fremgangsmåde til fremstilling deraf |
Country Status (11)
Country | Link |
---|---|
US (1) | US5183571A (da) |
EP (1) | EP0442557B1 (da) |
JP (1) | JPH0768683A (da) |
AT (1) | ATE113501T1 (da) |
AU (1) | AU633687B2 (da) |
BR (1) | BR9100580A (da) |
CA (1) | CA2035360A1 (da) |
DE (2) | DE4004153C1 (da) |
DK (1) | DK0442557T3 (da) |
ES (1) | ES2062657T3 (da) |
FI (1) | FI97604C (da) |
Families Citing this family (27)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6048410A (en) * | 1991-04-10 | 2000-04-11 | Isolyser Company, Inc. | Method of disposal of hot water soluble garments and like fabrics |
US5871679A (en) * | 1991-04-10 | 1999-02-16 | Isolyser Company, Inc. | Method of producing hot water soluble garments and like fabrics |
US5650219A (en) * | 1991-04-10 | 1997-07-22 | Isolyser Co. Inc. | Method of disposal of hot water soluble garments and like fabrics |
DE4126886A1 (de) * | 1991-08-14 | 1993-02-18 | Hp Medica Gmbh | Spuelkatheter |
ATE165251T1 (de) * | 1993-02-02 | 1998-05-15 | North West Water Group Plc | Poroese polymerstructur und verfahren |
DE4312126A1 (de) * | 1993-04-14 | 1994-10-20 | Mannesmann Ag | Gasdiffusionselektrode für elektrochemische Zellen |
US5885907A (en) * | 1993-04-29 | 1999-03-23 | Isolyser Company, Inc. | Method of disposal of hot water soluble garments and like fabrics |
US5620786A (en) * | 1993-04-29 | 1997-04-15 | Isolyser Co. Inc. | Hot water soluble towels, sponges and gauzes |
DE4409906C1 (de) * | 1994-03-23 | 1995-05-11 | Metallgesellschaft Ag | Komposit-Membran und ein Verfahren zu ihrer Herstellung |
US5661217A (en) * | 1994-08-05 | 1997-08-26 | Isolyser Company, Inc. | Method of manufacturing monolithic structures from polyvinyl alcohol |
US5470653A (en) * | 1994-08-05 | 1995-11-28 | Isolyser Company, Inc. | Disposable mop heads |
EP0888810B1 (en) * | 1996-03-18 | 2006-06-21 | Nitto Denko Corporation | Composite reverse osmosis membrane and method of reverse osmotic treatment of water using the same |
US5707731A (en) * | 1996-05-09 | 1998-01-13 | Isolyser Company, Inc. | Disposable cleaning articles |
US5891812A (en) * | 1996-10-11 | 1999-04-06 | Isolyser Company, Inc. | Liquid absorbable non-permeable fabrics and methods of making, using, and disposing thereof |
US6413425B1 (en) | 1997-04-10 | 2002-07-02 | Nitto Denko Corporation | Reverse osmosis composite membrane and reverse osmosis treatment method for water using the same |
DE10013995A1 (de) * | 2000-03-22 | 2001-09-27 | Chemagen Biopolymer Technologi | Magnetische, silanisierte Trägermaterialien auf Basis von Polyvinylalkohol |
WO2007016427A2 (en) * | 2005-07-28 | 2007-02-08 | Apio Inc. | Combinations of atmosphere control members |
WO2005074466A2 (en) | 2004-01-28 | 2005-08-18 | Apio Inc. | Packaging |
DE102004053402B3 (de) * | 2004-11-05 | 2006-06-01 | Gkss-Forschungszentrum Geesthacht Gmbh | Membran zur Trennung von Stoffgemischen und Verfahren zu ihrer Herstellung |
US20070033716A1 (en) * | 2005-05-18 | 2007-02-15 | Eye Safety Systems, Inc. | Goggles with removable frame and methods of making and using the same |
US20080034964A1 (en) * | 2006-08-09 | 2008-02-14 | Schmidt Richard D | Gas permeable membrane |
US20080202262A1 (en) * | 2006-08-09 | 2008-08-28 | Richard Schmidt | Gas permeable membrane |
WO2008144030A1 (en) * | 2007-05-17 | 2008-11-27 | Millipore Corporation | Membrane laminate |
ES2708133T3 (es) | 2010-09-20 | 2019-04-08 | Deltamem Ag | Membrana con una capa de separación no porosa, así como utilización y procedimiento para la producción de una membrana |
JP5955177B2 (ja) * | 2012-09-20 | 2016-07-20 | 日本バイリーン株式会社 | ポリビニルアルコール系樹脂が付与された多孔シートの製造方法 |
CN107486041B (zh) * | 2017-10-17 | 2020-04-28 | 常州市美纤膜技术有限公司 | 一种超低压复合反渗透膜及其制备方法 |
KR20220012890A (ko) * | 2019-06-27 | 2022-02-04 | 후지필름 가부시키가이샤 | 보호층 형성용 조성물의 제조 방법, 보호층 형성용 조성물의 보존 방법 및 이 보존 방법의 응용 |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2441311C2 (de) * | 1974-08-29 | 1984-07-19 | Peter, Siegfried, Prof.Dr., 8520 Erlangen | Verfahren zur Herstellung von Membranen für die umgekehrte Osmose |
JPS5237830A (en) * | 1975-09-19 | 1977-03-24 | Kuraray Co Ltd | Polyvinyl alcohol hollow fibers for dialysis |
AU505494B1 (en) * | 1977-10-21 | 1979-11-22 | Unisearch Limited | Anisotropic multilayered synthetic semipermeable membrane |
JPS5727102A (en) * | 1980-07-28 | 1982-02-13 | Nitto Electric Ind Co Ltd | Composite semipermeable membrane and its production |
IL63638A0 (en) * | 1980-09-16 | 1981-11-30 | Aligena Ag | Semipermeable composite membranes,their manufacture and their use |
DE3220570A1 (de) * | 1982-06-01 | 1983-12-01 | GFT Ingenieurbüro für Industrieanlagenbau, 6650 Homburg | Mehrschichtige membran und ihre verwendung zur trennung von fluessigkeitsgemischen nach dem pervaporationsverfahren |
US4802988A (en) * | 1987-09-17 | 1989-02-07 | Texaco Inc. | Dehydration of glycols |
DE4024517C1 (da) * | 1990-08-02 | 1991-11-21 | Metallgesellschaft Ag, 6000 Frankfurt, De |
-
1990
- 1990-02-10 DE DE4004153A patent/DE4004153C1/de not_active Expired - Lifetime
-
1991
- 1991-01-30 DK DK91200181.5T patent/DK0442557T3/da active
- 1991-01-30 DE DE59103377T patent/DE59103377D1/de not_active Expired - Lifetime
- 1991-01-30 AT AT91200181T patent/ATE113501T1/de not_active IP Right Cessation
- 1991-01-30 ES ES91200181T patent/ES2062657T3/es not_active Expired - Lifetime
- 1991-01-30 EP EP91200181A patent/EP0442557B1/de not_active Revoked
- 1991-01-31 CA CA002035360A patent/CA2035360A1/en not_active Abandoned
- 1991-02-07 FI FI910593A patent/FI97604C/fi active
- 1991-02-08 AU AU70846/91A patent/AU633687B2/en not_active Ceased
- 1991-02-08 JP JP3039489A patent/JPH0768683A/ja active Pending
- 1991-02-08 BR BR919100580A patent/BR9100580A/pt not_active Application Discontinuation
- 1991-02-11 US US07/653,653 patent/US5183571A/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
ES2062657T3 (es) | 1994-12-16 |
CA2035360A1 (en) | 1991-08-11 |
FI97604C (fi) | 1997-01-27 |
DE4004153C1 (en) | 1991-08-08 |
AU7084691A (en) | 1991-08-15 |
EP0442557B1 (de) | 1994-11-02 |
US5183571A (en) | 1993-02-02 |
FI910593A (fi) | 1991-08-11 |
AU633687B2 (en) | 1993-02-04 |
FI97604B (fi) | 1996-10-15 |
ATE113501T1 (de) | 1994-11-15 |
JPH0768683A (ja) | 1995-03-14 |
BR9100580A (pt) | 1991-10-29 |
DE59103377D1 (de) | 1994-12-08 |
EP0442557A1 (de) | 1991-08-21 |
FI910593A0 (fi) | 1991-02-07 |
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