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Class Information
Number: 210/500.33
Name: Liquid purification or separation > Filter > Material > Semipermeable membrane > Organic > Cyclic > Homocyclic
Description: Subject matter comprising at least one ring wherein all the ring atoms are carbon atoms.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 6994788 |
Sulfonated aromatic polymers, membrane containing said polymers and a method for production and use of the same |
Feb. 7, 2006 |
| 6841068 |
Domestic nanofiltration membrane based water purifier without storage tank |
Jan. 11, 2005 |
| 6837381 |
Highly permeable composite reverse osmosis membrane and method of producing the same |
Jan. 4, 2005 |
| 6622872 |
Micromachined membrane particle filter using parylene reinforcement |
Sep. 23, 2003 |
| 6558546 |
pH dependent membrane diffusion |
May. 6, 2003 |
| 6372136 |
Cellulose acetate semipermeable membrane and process for producing the cellulose acetate semipermeable membrane |
Apr. 16, 2002 |
| 6280853 |
Composite membrane with polyalkylene oxide modified polyamide surface |
Aug. 28, 2001 |
| 6126825 |
Microporous membrane and process for the production thereof |
Oct. 3, 2000 |
| 5776324 |
Electrochemical biosensors |
Jul. 7, 1998 |
| 5262056 |
Polyamides and polypyrrolones for fluid separation membranes |
Nov. 16, 1993 |
| 5075006 |
Isocyanurate crosslinked polyurethane membranes and their use for the separation of aromatics from non-aromatics |
Dec. 24, 1991 |
| 5012036 |
Polyarylate membranes or aromatics/saturates separation (C-2415) |
Apr. 30, 1991 |
| 5009824 |
Process for preparing an asymmetrical macroporous membrane polymer |
Apr. 23, 1991 |
| 4976860 |
Conjugated polymer-cation exchanger composite membrane |
Dec. 11, 1990 |
| 4968331 |
Organic polymer separation membrane having fluorene skeleton and oxygen enrichment device utilizing same |
Nov. 6, 1990 |
| 4964890 |
Aromatic polyether ketones |
Oct. 23, 1990 |
| 4950405 |
Functional thin organic membrane |
Aug. 21, 1990 |
| 4948508 |
Surface-hydrophilic, highly selective semipermeable membrane |
Aug. 14, 1990 |
| RE33273 |
Materials having improved nonfouling characteristics and method of making same |
Jul. 24, 1990 |
| 4908135 |
Moiety for selective separation |
Mar. 13, 1990 |
| 4876009 |
Tetrakis-amido high flux membranes |
Oct. 24, 1989 |
| 4867881 |
Orientied microporous film |
Sep. 19, 1989 |
| 4830885 |
Chlorine-resistant semipermeable membranes |
May. 16, 1989 |
| 4737286 |
Microfiltration membrane filter |
Apr. 12, 1988 |
| 4722795 |
Polyamide hollow fiber filtration membrane having barrier layer |
Feb. 2, 1988 |
| 4720343 |
Macroporous asymmetrical hydrophilic membrane made of a synthetic polymer |
Jan. 19, 1988 |
| 4705632 |
Hollow fiber membrane formed from a block copolymer of aromatic polyester and polyoxyethylene for dialysis of blood |
Nov. 10, 1987 |
| 4690765 |
Chemically modified semipermeable membranes and their use in reverse osmosis and ultrafiltration |
Sep. 1, 1987 |
| 4690766 |
Chemically modified semipermeable polysulfone membranes and their use in reverse osmosis and ultrafiltration |
Sep. 1, 1987 |
| 4661257 |
Liquid membrane system for the removal of nitrate from water |
Apr. 28, 1987 |
| 4643829 |
Multilayer reverse osmosis membrane in which one layer is poly-meta-phenylene cyclohexane-1,3,5-tricarboxamide |
Feb. 17, 1987 |
| 4613440 |
Composite membranes based on interpenetrating polymer networks |
Sep. 23, 1986 |
| 4612118 |
Composite semipermeable membrane of polyamine and trianzine |
Sep. 16, 1986 |
| 4608172 |
Plasmapheresis membrane and process for the preparation thereof |
Aug. 26, 1986 |
| 4607070 |
Polyether-copolycarbonates for dialysis membranes |
Aug. 19, 1986 |
| 4601827 |
Multistage annealing of aramide reverse osmosis membranes |
Jul. 22, 1986 |
| 4600507 |
Filter device for liquids |
Jul. 15, 1986 |
| 4584359 |
Vinyl polymer membranes |
Apr. 22, 1986 |
| 4477634 |
Modified acrylonitrile polymer containing semipermeable membranes |
Oct. 16, 1984 |
| 4471110 |
Polyamide of disulfonated diamine and permselective membrane thereof |
Sep. 11, 1984 |
| 4468500 |
Amino ketone cross-linked polyphenylene oxide |
Aug. 28, 1984 |
| 4468503 |
Amino ketone cross-linked polyphenylene oxide |
Aug. 28, 1984 |
| 4468502 |
Cross-linked polyphenylene oxide |
Aug. 28, 1984 |
| 4468501 |
Cross-linked polyphenylene oxide |
Aug. 28, 1984 |
| 4454176 |
Supported reverse osmosis membranes |
Jun. 12, 1984 |
| 4448687 |
Process for the production of semipermeable polybenzimidazole membranes with low temperature annealing |
May. 15, 1984 |
| 4440643 |
Process for producing aromatic polyimide composite separating membrane |
Apr. 3, 1984 |
| 4392963 |
Resorcinol or phloroglucinol condensation product for aqueous mixture purification |
Jul. 12, 1983 |
| 4388189 |
Process for preparation of improved semipermeable composite membranes |
Jun. 14, 1983 |
| 4385148 |
Reverse osmosis membrane preparation |
May. 24, 1983 |
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