Assignee
BETZ PAPERCHEM INC
US·37 granted patents·773 citations·filing 1988–1995
Top patents by PatentIndex Score
37 records- 0193US5061346APapermaking using cationic starch and carboxymethyl cellulose or its additionally substituted derivativesBETZ PAPERCHEM INC·Filed 1988·Granted Oct 29, 1991·113 cites·18 claims
- 0285US5405498AMethod for improving pulp washing efficiencyBETZ PAPERCHEM INC·Filed 1993·Granted Apr 11, 1995·33 cites·10 claims
- 0384US5344619AApparatus for dissolving dry polymerBETZ PAPERCHEM INC·Filed 1993·Granted Sep 6, 1994·113 cites·4 claims
- 0482US5139616AReduction of stickers contamination in papermaking process using recycled paperBETZ PAPERCHEM INC·Filed 1991·Granted Aug 18, 1992·30 cites·2 claims
- 0581US5314581AApparatus for simulating processing parameters and predicting variables in a papermaking operation including sequential pulsation, gravity and vacuum drainage, fines retention and paper formationBETZ PAPERCHEM INC·Filed 1991·Granted May 24, 1994·35 cites·5 claims
- 0680US5250152AEthoxylated alcohol and dialkylphenol surfactants as Kraft pulping additives for reject reduction and yield increaseBETZ PAPERCHEM INC·Filed 1992·Granted Oct 5, 1993·30 cites·6 claims
- 0773US5266166AMethods for controlling the deposition of organic contaminants in pulp and papermaking processes using a polyalkylene oxide/vinyl acetate graft copolymerBETZ PAPERCHEM INC·Filed 1992·Granted Nov 30, 1993·23 cites·15 claims
- 0871US4906331AMethod of enhancing the cooking of wood chips for pulp productionBETZ PAPERCHEM INC·Filed 1988·Granted Mar 6, 1990·18 cites·3 claims
- 0968US5200034AUse of surfactants having an HLB less than 10 in the deinking of dry toner electrostatic printed wastepaperBETZ PAPERCHEM INC·Filed 1991·Granted Apr 6, 1993·27 cites·9 claims
- 1068US4956051ADetackification of adhesive materials contained in secondary fiber using polyvinyl alcoholBETZ PAPERCHEM INC·Filed 1989·Granted Sep 11, 1990·29 cites·6 claims
- 1165US5141598AProcess and composition for deinking dry toner electrostatic printed wastepaperBETZ PAPERCHEM INC·Filed 1991·Granted Aug 25, 1992·17 cites·8 claims
- 1264US5415740AMethod for improving retention and drainage characteristics in alkaline papermakingBETZ PAPERCHEM INC·Filed 1994·Granted May 16, 1995·13 cites·12 claims
- 1364US5256253AMethods for inhibiting barium sulfate deposition using a poly(amine)compound or its salts in papermaking systemsBETZ PAPERCHEM INC·Filed 1992·Granted Oct 26, 1993·26 cites·11 claims
- 1463US5229033APolybutene based foam control compositions for aqueous systemsBETZ PAPERCHEM INC·Filed 1991·Granted Jul 20, 1993·26 cites·5 claims
- 1561US5312841AWater based biocideBETZ PAPERCHEM INC·Filed 1992·Granted May 17, 1994·13 cites·7 claims
- 1660US5292403AMethod for inhibiting the deposition of organic contaminants in pulp and papermaking processesBETZ PAPERCHEM INC·Filed 1993·Granted Mar 8, 1994·23 cites·8 claims
- 1757US5482595AMethod for improving retention and drainage characteristics in alkaline papermakingBETZ PAPERCHEM INC·Filed 1994·Granted Jan 9, 1996·18 cites·14 claims
- 1855US5248388AUse of surfactants having an HLB less than 10 in the deinking of dry toner electrostatic printed wastepaperBETZ PAPERCHEM INC·Filed 1992·Granted Sep 28, 1993·18 cites·13 claims
- 1954US5094716AUse of anionic surfactant/dispersant blends for the deinking of groundwood newsprintBETZ PAPERCHEM INC·Filed 1990·Granted Mar 10, 1992·13 cites·11 claims
- 2052US5320777AFoam control compositionsBETZ PAPERCHEM INC·Filed 1992·Granted Jun 14, 1994·15 cites·6 claims
- 2151US5256254AMethods of controlling deposition in a paper machine dryer sectionBETZ PAPERCHEM INC·Filed 1991·Granted Oct 26, 1993·16 cites·3 claims
- 2249US5530137AMethods and compositions for stabilizing fatty acid imidazoline solutionsBETZ PAPERCHEM INC·Filed 1994·Granted Jun 25, 1996·4 cites·14 claims
- 2349US5167767APaper mill press felt conditionerBETZ PAPERCHEM INC·Filed 1991·Granted Dec 1, 1992·12 cites·13 claims
- 2447US5425899AUse of foam control composition in aqueous systemsBETZ PAPERCHEM INC·Filed 1994·Granted Jun 20, 1995·12 cites·7 claims
- 2544US5536363AMethods for inhibiting the deposition of organic contaminants in pulp and papermaking systems using a composition comprising of polyvinyl alcohol and gelatinBETZ PAPERCHEM INC·Filed 1995·Granted Jul 16, 1996·8 cites·9 claims
- 2643US5281348AUse of anionic surfactant/dispersant blends for the deinking of groundwood newsprintBETZ PAPERCHEM INC·Filed 1991·Granted Jan 25, 1994·7 cites·5 claims
- 2742US5538668AAntifoam composition for aqueous starch and paper coating systemsBETZ PAPERCHEM INC·Filed 1994·Granted Jul 23, 1996·11 cites·2 claims
- 2842US5468393AMethods of controlling scale formation in the presence of metal ions in aqueous systemsBETZ PAPERCHEM INC·Filed 1994·Granted Nov 21, 1995·13 cites·2 claims
- 2942US5127993AMethod of enhancing green liquor semi-chemical pulp productionBETZ PAPERCHEM INC·Filed 1990·Granted Jul 7, 1992·7 cites·11 claims
- 3041US5302242AProcess and composition for deinking dry toner electrostatic printed wastepaperBETZ PAPERCHEM INC·Filed 1992·Granted Apr 12, 1994·7 cites·8 claims
- 3140US5464502AAnionic sulfonate surfactants in the washing and pulping operationBETZ PAPERCHEM INC·Filed 1993·Granted Nov 7, 1995·7 cites·9 claims
- 3238US5520781AMethod of inhibiting wet strength resin deposition in papermaking feltsBETZ PAPERCHEM INC·Filed 1995·Granted May 28, 1996·10 cites·8 claims
- 3336US5415798AConcentrated high flash point surfactant compositionsBETZ PAPERCHEM INC·Filed 1994·Granted May 16, 1995·5 cites·12 claims
- 3436US5368740AMethods of controlling scale formation in the presence of metal ions in aqueous systemsBETZ PAPERCHEM INC·Filed 1993·Granted Nov 29, 1994·9 cites·3 claims
- 3536US5283002AAntifoam/defoamer composition and method of use thereof in aqueous systemsBETZ PAPERCHEM INC·Filed 1991·Granted Feb 1, 1994·6 cites·14 claims
- 3635US5282997AProcess and composition for deinking dry toner electrostatic printed wastepaperBETZ PAPERCHEM INC·Filed 1992·Granted Feb 1, 1994·4 cites·5 claims
- 3734US5532308AMethod for improving retention and drainage characteristics in alkaline papermakingBETZ PAPERCHEM INC·Filed 1995·Granted Jul 2, 1996·2 cites·10 claims
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