Betz PaperChem, Inc.

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Technologies

Intl Class Technology Matters Rank in Class
 
  
 
D21H PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C, D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR 434
 
  
 
D21C PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE- CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR325
 
  
 
A01N PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF 194
 
  
 
B01D SEPARATION 1133
 
  
 
C02F TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE 154
 
  
 
C08L COMPOSITIONS OF MACROMOLECULAR COMPOUNDS 1115
 
  
 
C11D DETERGENT COMPOSITIONS 164
 
  
 
D21F PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON128

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
5536363 Methods for inhibiting the deposition of organic contaminants in pulp and papermaking systems using a composition comprising of polyvinyl alcohol and gelatinApr 12, 95Jul 16, 96[D21C]
5532308 Method for improving retention and drainage characteristics in alkaline papermakingJan 17, 95Jul 02, 96[D21H, C08L]
5468393 Methods of controlling scale formation in the presence of metal ions in aqueous systemsOct 20, 94Nov 21, 95[C02F]
5464502 Anionic sulfonate surfactants in the washing and pulping operationOct 05, 93Nov 07, 95[D21C]
5415740 Method for improving retention and drainage characteristics in alkaline papermakingMar 24, 94May 16, 95[D21H]
5415798 Concentrated high flash point surfactant compositionsJan 14, 94May 16, 95[C11D]
5312841 Water based biocideJun 15, 92May 17, 94[A01N]
5266166 Methods for controlling the deposition of organic contaminants in pulp and papermaking processes using a polyalkylene oxide/vinyl acetate graft copolymerMay 18, 92Nov 30, 93[D21H, D21C]
5229033 Polybutene based foam control compositions for aqueous systemsFeb 06, 91Jul 20, 93[B01D]
5167767 Paper mill press felt conditionerMar 25, 91Dec 01, 92[D21F]

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5538668 Antifoam composition for aqueous starch and paper coating systemsExpiredApr 19, 94Jul 23, 96[B01D]
5530137 Methods and compositions for stabilizing fatty acid imidazoline solutionsExpiredSep 16, 94Jun 25, 96[C07D]
5520781 Method of inhibiting wet strength resin deposition in papermaking feltsExpiredFeb 22, 95May 28, 96[D21F]
5200034 Use of surfactants having an HLB less than 10 in the deinking of dry toner electrostatic printed wastepaperExpiredApr 25, 91Apr 06, 93[D21C]
5141598 Process and composition for deinking dry toner electrostatic printed wastepaperExpiredApr 25, 91Aug 25, 92[D21C]
5127993 Method of enhancing green liquor semi-chemical pulp productionExpiredJan 10, 90Jul 07, 92[D21C]
5104487 Papermaking using cationic starch and naturally anionic polysacchride gumsExpiredAug 16, 90Apr 14, 92[D21H]
5094716 Use of anionic surfactant/dispersant blends for the deinking of groundwood newsprintExpiredSep 19, 90Mar 10, 92[D21C]
5074961 Process for controlling pitch deposition from pulp in papermaking systemsExpiredJul 17, 89Dec 24, 91[D21D]

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