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Class Information
Number: 528/482
Name: Synthetic resins or natural rubbers -- part of the class 520 series > Synthetic resins (class 520, subclass 1) > Treating polymer containing material or treating a solid polymer or a resinifiable intermediate condensation product > Contacting with ion exchange material or solid sorbent
Description: Processes wherein a solid sorbent mass is used to retain on its surface a constituent of a mixture, or wherein an ion-exchange material is used to contact the polymer or polymer-containing material.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 5874111 |
Process for the preparation of highly monodispersed polymeric hydrophilic nanoparticles |
Feb. 23, 1999 |
| 5869543 |
Process for the synthesis of polyethylene carboxylate from polyethylene carboxylate waste |
Feb. 9, 1999 |
| 5847072 |
Removal of lithium from polymer cements |
Dec. 8, 1998 |
| 5830990 |
Low metals perfluorooctanoic acid and top anti-reflective coatings for photoresists |
Nov. 3, 1998 |
| 5824769 |
Polyether, polyester and polyether ester purification process |
Oct. 20, 1998 |
| 5777004 |
Method of neutralizing protein allergens in natural rubber latex product formed thereby |
Jul. 7, 1998 |
| 5770677 |
Process for the removal of alkali from condensation resins |
Jun. 23, 1998 |
| 5756644 |
Polyesters |
May. 26, 1998 |
| 5750032 |
Removal of lithium from polymer cements |
May. 12, 1998 |
| 5741888 |
Removal of heteropoly compounds from polyethers, polyesters and polyether esters |
Apr. 21, 1998 |
| 5739267 |
Process for isolation of isobutylene polymer |
Apr. 14, 1998 |
| 5739265 |
Fractionation of phenol formaldehyde condensate and photoresist compositions produced therefrom |
Apr. 14, 1998 |
| 5693749 |
Fractionation of phenol formaldehyde condensate and photoresist compositions produced therefrom |
Dec. 2, 1997 |
| 5688631 |
Methods for producing polybenzoxazol precursors and corresponding resist solutions |
Nov. 18, 1997 |
| 5686561 |
Metal ion reduction in novolak resin solution using an anion exchange resin |
Nov. 11, 1997 |
| 5679766 |
Purification process of novolar resins using acid treated chelating cation exchange resin |
Oct. 21, 1997 |
| 5674934 |
Reversible and irreversible water-based coatings |
Oct. 7, 1997 |
| 5674662 |
Process for removing metal ions from organic photoresist solutions |
Oct. 7, 1997 |
| 5665517 |
Acidic ion exchange resin as a catalyst to synthesize a novolak resin and photoresist composition therefrom |
Sep. 9, 1997 |
| 5637631 |
Preparation process of degradable polymer |
Jun. 10, 1997 |
| 5637400 |
Cycloolefin copolymers having low melt viscosity and low optical attenuation |
Jun. 10, 1997 |
| 5624789 |
Metal ion reduction in top anti-reflective coatings for photoresisis |
Apr. 29, 1997 |
| 5618655 |
Process of reducing trace levels of metal impurities from resist components |
Apr. 8, 1997 |
| 5599897 |
Aromatic polycarbonate, a method for producing the same, and a plastic optical waveguide using the same |
Feb. 4, 1997 |
| 5594098 |
Metal ion reduction in novolak resins and photoresists |
Jan. 14, 1997 |
| 5563241 |
Methods to remove proteins from natural rubber latex |
Oct. 8, 1996 |
| 5552504 |
Semi-crystalline cycloolefin copolymer film |
Sep. 3, 1996 |
| 5552514 |
Acid catalyzed process for preparing amino acid polymers |
Sep. 3, 1996 |
| 5545712 |
Preparation process for polyoxyalkylene polyol |
Aug. 13, 1996 |
| 5543263 |
Photoresist having a low level of metal ions |
Aug. 6, 1996 |
| 5536811 |
Process for improving water-whitening resistance of pressure sensitive adhesives |
Jul. 16, 1996 |
| 5530049 |
Solutions of perfluorinated polymers in CO.sub.2 |
Jun. 25, 1996 |
| 5516885 |
Epihalohydrin-based resins having a reduced halogen content |
May. 14, 1996 |
| 5516886 |
Metal ion reduction in top anti-reflective coatings for photoresists |
May. 14, 1996 |
| 5498677 |
Process for preparation and purification of material of a cycloolefin copolymer |
Mar. 12, 1996 |
| 5496913 |
Aromatic polycarbonate, a method for producing the same, and a plastic optical waveguide using the same |
Mar. 5, 1996 |
| 5494756 |
Method for wet chemical surface modification of formed polysiloxane products and coated substrates silicones |
Feb. 27, 1996 |
| 5476750 |
Metal ion reduction in the raw materials and using a Lewis base to control molecular weight of novolak resin to be used in positive photoresists |
Dec. 19, 1995 |
| 5463021 |
Process for working up aqueous dispersions of fluorinated thermoplastic |
Oct. 31, 1995 |
| 5446125 |
Method for removing metal impurities from resist components |
Aug. 29, 1995 |
| 5446126 |
Method for removing metal impurities from resist components |
Aug. 29, 1995 |
| 5442040 |
Extraction of selection hydrocarbons from a hydrocarbon stream using a carbon adsorbent |
Aug. 15, 1995 |
| 5434244 |
Process for isolating macrocyclic polyester oligomers |
Jul. 18, 1995 |
| 5432243 |
Process for the polymerization of olefins |
Jul. 11, 1995 |
| 5425879 |
Removal of base residues from poly(vinyl alcohol) reaction-slurries |
Jun. 20, 1995 |
| 5382653 |
Preparation of copolymers |
Jan. 17, 1995 |
| 5378802 |
Method for removing impurities from resist components and novolak resins |
Jan. 3, 1995 |
| 5338824 |
Removal of alkali metal methoxide catalyst residue from hydroxy-terminated conjugated diene polymers |
Aug. 16, 1994 |
| 5322927 |
Method for producing polymers |
Jun. 21, 1994 |
| 5319070 |
Process for removal of ash from poly(vinyl alcohol) polymers |
Jun. 7, 1994 |
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