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Class Information
Number: 521/25
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
Description: Subject matter under Class 520, ... drawn to a solid ion-exchange polymeric material containing ionic groups exchangeable with other ionic groups.










Sub-classes under this class:

Class Number Class Name Patents
521/30 Chemically treated solid polymer 233
521/39 From aldehyde or derivative 27
521/38 From ethylenically unsaturated reactant only 175
521/27 Membrane or process of preparing 725
521/29 Polymer characterized by defined size or shape other than bead or pearl 108
521/28 Previously formed solid ion-exchange polymer admixed with nonreactive material or ion-exchange polymer 305
521/26 Process of regenerating 156


Patents under this class:
1 2 3 4 5 6 7

Patent Number Title Of Patent Date Issued
8710111 Porous polymeric resins Apr. 29, 2014
8710108 Proton conducting electrolytes with cross-linked copolymer additives for use in fuel cells Apr. 29, 2014
8691176 Methods of producing carbonate minerals and apparatuses of producing the carbonate minerals Apr. 8, 2014
8691469 Proton conducting membranes for fuel cells having a proton gradient and methods for preparing said membranes Apr. 8, 2014
8686055 Shell functionalized ion exchange resins Apr. 1, 2014
8658706 Organic superacid monomers containing a bis-sulfonic acid group and methods of making and using the same Feb. 25, 2014
8604090 Process for dissolution of highly fluorinated ion-exchange polymers Dec. 10, 2013
8574462 High temperature stable polyelectrolytes having backbone aromatic groups Nov. 5, 2013
8562922 Picolylamine resins Oct. 22, 2013
8563622 Picolylamine resins Oct. 22, 2013
8546004 Liquid composition, process for its production and process for producing membrane-electrode assembly for polymer electrolyte fuel cells Oct. 1, 2013
8530109 Anion exchange polymer electrolytes Sep. 10, 2013
8519014 Ion exchangeable mixture and method of producing the same Aug. 27, 2013
8492049 Anion exchange polymer electrolytes Jul. 23, 2013
8492460 Fluorinated polymer blocks for PEM applications Jul. 23, 2013
8461242 Liquid composition Jun. 11, 2013
8440730 Method for improved removal of cations by means of chelating resins May. 14, 2013
8436057 Anion exchange membrane May. 7, 2013
8436055 Modified acidic ion-exchange resin and method for preparing bisphenol May. 7, 2013
8436054 Fluorinated ionomer produced by aqueous polymerization using dispersed particulate of fluorinated ionomer produced in situ May. 7, 2013
8436053 Fluorinated ionomer produced by aqueous polymerization using dispersed particulate of fluorinated ionomer May. 7, 2013
8426479 Modified ion exchange resin and process for producing bisphenols Apr. 23, 2013
8420701 Polymer electrolyte membrane, membrane-electrode assembly for polymer electrolyte fuel cells and process for producing polymer electrolyte membrane Apr. 16, 2013
8399528 Method for improved removal of cations by means of chelating resins Mar. 19, 2013
8389587 Microporous polymer separators for lithium ion batteries and method for producing the same Mar. 5, 2013
8377997 Fullerene based proton conductive materials Feb. 19, 2013
8362195 Ionically conductive polymer for use in electrochemical devices Jan. 29, 2013
8362182 Process for producing cation exchangers Jan. 29, 2013
8362096 Fullerene based proton conductive materials Jan. 29, 2013
8349523 Electrolyte membrane for polymer electrolyte fuel cells, process for its production and membrane-electrode assembly for polymer electrolyte fuel cells Jan. 8, 2013
8343257 Polymer pi-bond-philic filler composites Jan. 1, 2013
8343474 Substituted organopolysiloxanes and uses thereof Jan. 1, 2013
8344034 Shape memory materials comprising polyelectrolyte segments Jan. 1, 2013
8299147 Chemical resistant ionomers and protective coverings Oct. 30, 2012
8298720 Proton conductor Oct. 30, 2012
8268042 Polymer inorganic clay composites Sep. 18, 2012
8263229 Composite structures for the absorption of dissolved metals Sep. 11, 2012
8263671 Ion exchangeable mixture and method of producing the same Sep. 11, 2012
8232325 Separation membrane for direct liquid fuel cell and method for producing same Jul. 31, 2012
8222367 Polymers for use in fuel cell components Jul. 17, 2012
8211588 Sulfonated poly(arylene sulfone), crosslinked material thereof, clay nanocomposite including the same, and fuel cell including the same Jul. 3, 2012
8211950 Amphoteric ion exchangers Jul. 3, 2012
8207284 Process for producing cation exchangers Jun. 26, 2012
8198394 Process for producing electrolyte material for polymer electrolyte fuel cells, and membrane-electrode assembly for polymer electrolyte fuel cells Jun. 12, 2012
8178590 Block copolymer and use thereof May. 15, 2012
8163406 Membrane-electrode assembly for solid polymer electrolyte fuel cell Apr. 24, 2012
8110320 Method of making durable polymer electrolyte membranes Feb. 7, 2012
8088833 Method for purifying an IgG monomer Jan. 3, 2012
8063111 Anion-conducting polymer, composition, and membrane Nov. 22, 2011
8039520 Electrolyte membrane comprising nanocomposite ion complex, manufacturing method thereof, and fuel cell including the same Oct. 18, 2011

1 2 3 4 5 6 7










 
 
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