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Class Information
Number: 521/27
Name: Synthetic resins or natural rubbers -- part of the class 520 series > Synthetic resins (class 520, subclass 1) > Ion-exchange polymer or process of preparing > Membrane or process of preparing
Description: Subject matter wherein the ion-exchange polymer is in the form of a membrane.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7459505 |
Block copolymers with acidic groups |
Dec. 2, 2008 |
| 7459487 |
Polymer composite membrane and method of making the same |
Dec. 2, 2008 |
| 7452621 |
Polymer membrane for fuel cell and method for preparing the same |
Nov. 18, 2008 |
| 7445867 |
Electrode structure for solid-polymer type fuel cell |
Nov. 4, 2008 |
| 7439275 |
Anion-conducting polymer, composition, and membrane |
Oct. 21, 2008 |
| 7435498 |
Polymer electrolyte membranes crosslinked by nitrile trimerization |
Oct. 14, 2008 |
| 7435496 |
Anhydrous proton conductor based on heterocycle attached to a polymer backbone |
Oct. 14, 2008 |
| 7411022 |
Reinforced polymer electrolyte membrane |
Aug. 12, 2008 |
| 7402361 |
Ion conductor structural body and process for producing ion conductor structural body |
Jul. 22, 2008 |
| 7399791 |
Fluorinated membranes |
Jul. 15, 2008 |
| 7388035 |
Method for preparing poly(2,5-benzimidazole) |
Jun. 17, 2008 |
| 7368198 |
Polymer nanocomposite membrane and fuel cell using the same |
May. 6, 2008 |
| 7368200 |
Composite polymer electrolyte membranes and electrode assemblies for reducing fuel crossover in direct liquid feed fuel cells |
May. 6, 2008 |
| 7368505 |
Graft copolymers |
May. 6, 2008 |
| 7361729 |
Ion-conducting sulfonated polymeric materials |
Apr. 22, 2008 |
| 7357999 |
Nanocomposite electrolyte membrane and fuel cell employing the same |
Apr. 15, 2008 |
| 7348089 |
Membrane-electrode assembly for direct methanol type fuel cell and proton conductive membrane |
Mar. 25, 2008 |
| 7348088 |
Polymer electrolyte membrane |
Mar. 25, 2008 |
| 7339008 |
Membranes for selective gas separation |
Mar. 4, 2008 |
| 7332530 |
Proton-conducting polymer membrane comprising a polymer with sulphonic acid groups and use thereof in fuel cells |
Feb. 19, 2008 |
| 7326736 |
Composite proton exchange membrane and method of manufacturing the same |
Feb. 5, 2008 |
| 7323265 |
High stability membrane for proton exchange membrane fuel cells |
Jan. 29, 2008 |
| 7311989 |
Polymer membrane, process for its production and membrane-electrode assembly for solid polymer electrolyte fuel cells |
Dec. 25, 2007 |
| 7306867 |
Proton conductive solid polymer electrolyte |
Dec. 11, 2007 |
| 7306876 |
Method for producing membrane-electrode structure and polymer electrolyte fuel cell |
Dec. 11, 2007 |
| 7307138 |
Polymer electrolytes and process for their preparation |
Dec. 11, 2007 |
| 7288603 |
Polybenzazole compound having sulfonic acid group and/or phosphonic acid group, resin composition containing the same, resin molding, solid polymer electrolyte membrane, solid polymer electrol |
Oct. 30, 2007 |
| 7285349 |
Polymer electrolyte membrane and method of making |
Oct. 23, 2007 |
| 7285616 |
Aromatic polymer, method for producing the same and uses thereof |
Oct. 23, 2007 |
| 7282291 |
Water free proton conducting membranes based on poly-4-vinylpyridinebisulfate for fuel cells |
Oct. 16, 2007 |
| 7268205 |
Medical devices and applications of polyhydroxyalkanoate polymers |
Sep. 11, 2007 |
| 7258941 |
Polymer electrolyte for solid polymer type fuel cell and fuel cell |
Aug. 21, 2007 |
| 7250189 |
Increasing the hydrophilicity of carbon fiber paper by electropolymerization |
Jul. 31, 2007 |
| 7241367 |
Permeable membrane diaphragm of different layers for electroytic cells |
Jul. 10, 2007 |
| 7235333 |
Ion conductor structural body, process for producing said ion conductor structural body, rechargeable battery provided with said ion conductor structural body and process for producing said re |
Jun. 26, 2007 |
| 7229553 |
Method for producing a membrane made of bridged polymer and a fuel cell |
Jun. 12, 2007 |
| 7226699 |
Proton conductor film, manufacturing method therefor, fuel cell provided with proton conductor film and manufacturing method therefor |
Jun. 5, 2007 |
| 7220510 |
Sulfonated poly(arylene) films as polyelectrolyte membranes |
May. 22, 2007 |
| 7217742 |
Sulphonic fluorinated ionomers |
May. 15, 2007 |
| 7179321 |
Facilitated transport membranes comprising a porous support and a solid polymer electrolyte consisting of a transition metal salt and a polymer having phthalic structure |
Feb. 20, 2007 |
| 7179560 |
Composite electrolyte membrane and fuel cell containing the same |
Feb. 20, 2007 |
| 7179883 |
Medical devices and applications of polyhydroxyalkanoate polymers |
Feb. 20, 2007 |
| 7169822 |
Polymeric actuator |
Jan. 30, 2007 |
| 7166685 |
Compositions containing particles of highly fluorinated ion exchange polymer |
Jan. 23, 2007 |
| 7166644 |
Porous polymeric membrane comprising vinylidene fluoride |
Jan. 23, 2007 |
| 7163964 |
Method for preparing an ion exchange media |
Jan. 16, 2007 |
| 7160926 |
Ion exchange fluorocarbon resin membrane |
Jan. 9, 2007 |
| 7160927 |
Sulfonated aryl sulfonate matrices and method of production |
Jan. 9, 2007 |
| 7160928 |
Acid functional fluoropolymer membranes and method of manufacture |
Jan. 9, 2007 |
| 7147891 |
Polymer substrate coated with weak cationic-exchange functional layer |
Dec. 12, 2006 |
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