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Class Information
Number: 210/500.3
Name: Liquid purification or separation > Filter > Material > Semipermeable membrane > Organic > Cyclic > Cellulosic > Cellulose acetate
Description: Subject matter comprising esters of cellulose with acetic acid, i.e., containing at least one -O-C(=O)-CH3
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7422686 |
Cellulose hydrate ultrafiltration membranes and method for their production |
Sep. 9, 2008 |
| 7381330 |
Cellulose-based microporous membrane |
Jun. 3, 2008 |
| 7153426 |
Charged filtration membranes and uses therefor |
Dec. 26, 2006 |
| 6899834 |
Composite membranes and methods for making such membranes |
May. 31, 2005 |
| 6632366 |
Cellulose compound hollow fiber membrane |
Oct. 14, 2003 |
| 6558546 |
pH dependent membrane diffusion |
May. 6, 2003 |
| 6498007 |
Methods of treatment of disease using adsorbent carriers |
Dec. 24, 2002 |
| 6372136 |
Cellulose acetate semipermeable membrane and process for producing the cellulose acetate semipermeable membrane |
Apr. 16, 2002 |
| 6358754 |
(Bio)chemical reagent solid phases, process for their production and their applications |
Mar. 19, 2002 |
| 6350621 |
(Bio)chemical reagent solid phases, process for their production and their applications |
Feb. 26, 2002 |
| 6344239 |
Method for producing a tobacco filter material |
Feb. 5, 2002 |
| 6293411 |
Integral supported separation membranes |
Sep. 25, 2001 |
| 6139742 |
Membrane-based sorbent for heavy metal sequestration |
Oct. 31, 2000 |
| 6103121 |
Membrane-based sorbent for heavy metal sequestration |
Aug. 15, 2000 |
| 6099734 |
Apparatus, membranes and methods for removing organic compounds from a biological fluid |
Aug. 8, 2000 |
| 5871680 |
Method and apparatus for spinning hollow fiber membranes |
Feb. 16, 1999 |
| 5856006 |
Tobacco filter material and a method for producing the same |
Jan. 5, 1999 |
| 5853647 |
Process for the stabilization of the properties of cellulosic membranes |
Dec. 29, 1998 |
| 5849189 |
Hollow fiber blood purifying membrane and process for its production |
Dec. 15, 1998 |
| 5840190 |
Surface modified biocompatible membranes |
Nov. 24, 1998 |
| 5783124 |
Cellulose acetate hemodialysis membrane |
Jul. 21, 1998 |
| 5736046 |
High-flux hollow-fiber membrane with enhanced transport capability and process for making same |
Apr. 7, 1998 |
| 5711881 |
Hematopoietic inhibiting factor containing compositions |
Jan. 27, 1998 |
| 5695717 |
Gas exchange apparatus |
Dec. 9, 1997 |
| 5667691 |
Process for extracting water and acetic acid from the aqueous phase of cellulose acetate |
Sep. 16, 1997 |
| 5643452 |
High-flux hollow-fiber membrane with enhanced transport capability and process for making same |
Jul. 1, 1997 |
| 5628960 |
Composite cellulose nitrate membrane on polyester support |
May. 13, 1997 |
| 5624561 |
Cellulose acetate hemodialysis membrane |
Apr. 29, 1997 |
| 5620790 |
Multi-layer microfiltration membrane having an integrated prefiltration layer and method of making same |
Apr. 15, 1997 |
| 5611930 |
Cellulose ester blend membranes, process for making same and their use |
Mar. 18, 1997 |
| 5554287 |
Cellulose matrix filter material |
Sep. 10, 1996 |
| 5522991 |
Cellulosic ultrafiltration membrane |
Jun. 4, 1996 |
| 5505890 |
Process for manufacturing cellulose acetate membranes |
Apr. 9, 1996 |
| 5472607 |
Hollow fiber semipermeable membrane of tubular braid |
Dec. 5, 1995 |
| 5462801 |
Filter Tow, method for the production thereof, as well as tobacco smoke filter element and method for its production |
Oct. 31, 1995 |
| 5403485 |
Dialysis membrane made of cellulose acetate |
Apr. 4, 1995 |
| 5387345 |
Cellulose acetate membranes |
Feb. 7, 1995 |
| 5277811 |
Process for forming porous polymeric product from a nonporous polymeric composition and product |
Jan. 11, 1994 |
| 5254248 |
Blood plasma separating apparatus |
Oct. 19, 1993 |
| 5202432 |
Assay for an analyte on a solid porous support |
Apr. 13, 1993 |
| 5149649 |
Multi-layered porous hollow fiber membrane for use in cell culture |
Sep. 22, 1992 |
| 5091520 |
Finely particulate cellulose esters of aromatic or aromatic-aliphatic carboxylic acids, process for their preparation, and the use thereof |
Feb. 25, 1992 |
| 5053132 |
Asymmetrically-wettable porous membrane |
Oct. 1, 1991 |
| 5049259 |
Membrane process for drying liquid hydrocarbons |
Sep. 17, 1991 |
| 4990442 |
Assay for an analyte on a solid porous support |
Feb. 5, 1991 |
| 4913864 |
Process for preparation of porous hollow filament |
Apr. 3, 1990 |
| 4894157 |
Process for producing supported celluosic membranes and products |
Jan. 16, 1990 |
| 4883593 |
Ultrathin-skinned asymmetric membranes by immiscible solvents treatment |
Nov. 28, 1989 |
| 4857196 |
Porous hollow fiber membrane and a method for the removal of a virus by using the same |
Aug. 15, 1989 |
| 4855491 |
Method for selectively removing process stream impurities utilizing reverse osmosis |
Aug. 8, 1989 |
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