Betz PaperChem, Inc.
Patent Owner
Stats
- 11 US PATENTS IN FORCE
- 0 US APPLICATIONS PENDING
- Jul 23, 1996 most recent publication
Details
- 11 Issued Patents
- 0 Issued in last 3 years
- 0 Published in last 3 years
- 222 Total Citation Count
- Jul 17, 1989 Earliest Filing
- 9 Expired/Abandoned/Withdrawn Patents
Patent Activity in the Last 10 Years
Technologies
Intl Class
Technology
Matters
Rank in Class
Top Patents (by citation)
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Recent Publications
- No Recent Publications to Display
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]
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]
Expired/Abandoned/Withdrawn Patents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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