Assignee
COLUMBIAN CHEM
US·37 granted patents·3 pending applications·728 citations·filing 1979–2016
Top patents by PatentIndex Score
40 records- 0191US7847009B2Carbonaceous material with dissociated aggregate size and particle size distribution and improved dispersibilityCOLUMBIAN CHEM·Filed 2008·Granted Dec 7, 2010·30 cites·27 claims
- 0290US6831194B2Surface modification of carbonaceous materials by introduction of gamma keto carboxyl containing functional groupsCOLUMBIAN CHEM·Filed 2002·Granted Dec 14, 2004·56 cites·44 claims
- 0388US4391789ACarbon black processCOLUMBIAN CHEM·Filed 1982·Granted Jul 5, 1983·84 cites·3 claims
- 0485US6958308B2Deposition of dispersed metal particles onto substrates using supercritical fluidsCOLUMBIAN CHEM·Filed 2004·Granted Oct 25, 2005·33 cites·31 claims
- 0585US4952617ADispersion of pigments in resins and coatings systemsCOLUMBIAN CHEM·Filed 1989·Granted Aug 28, 1990·47 cites·7 claims
- 0684US4755371AMethod for producing carbon blackCOLUMBIAN CHEM·Filed 1983·Granted Jul 5, 1988·35 cites·4 claims
- 0781US7241334B2Sulfonated carbonaceous materialsCOLUMBIAN CHEM·Filed 2002·Granted Jul 10, 2007·20 cites·22 claims
- 0881US5375730AUnloading valve for hopper carCOLUMBIAN CHEM·Filed 1993·Granted Dec 27, 1994·65 cites·15 claims
- 0980US7167240B2Carbon black sampling for particle surface area measurement using laser-induced incandescence and reactor process control based thereonCOLUMBIAN CHEM·Filed 2003·Granted Jan 23, 2007·45 cites·27 claims
- 1080US4798856APigment dispersion in resinCOLUMBIAN CHEM·Filed 1987·Granted Jan 17, 1989·28 cites·12 claims
- 1172US5494955AUse of silane coupling agent with carbon black to enhance the balance of reinforcement properties of rubber compoundsCOLUMBIAN CHEM·Filed 1994·Granted Feb 27, 1996·21 cites·33 claims
- 1271US6120594AHydrogen peroxide oxidation of carbon blackCOLUMBIAN CHEM·Filed 1999·Granted Sep 19, 2000·31 cites·8 claims
- 1370US4322565AProcess for purifying ethersCOLUMBIAN CHEM·Filed 1981·Granted Mar 30, 1982·11 cites·4 claims
- 1468US4927607ANon-cylindrical reactor for carbon black productionCOLUMBIAN CHEM·Filed 1988·Granted May 22, 1990·19 cites·10 claims
- 1568US4351815ABattery carbon blackCOLUMBIAN CHEM·Filed 1981·Granted Sep 28, 1982·17 cites·9 claims
- 1667US7195834B2Metallized conducting polymer-grafted carbon material and method for makingCOLUMBIAN CHEM·Filed 2003·Granted Mar 27, 2007·12 cites·11 claims
- 1767US5708055AThermoplastic composition comprising chemically modified carbon black and their applicationsCOLUMBIAN CHEM·Filed 1996·Granted Jan 13, 1998·27 cites·11 claims
- 1866US7413683B2Sulfonated conducting polymer-grafted carbon material for fuel cell applicationsCOLUMBIAN CHEM·Filed 2003·Granted Aug 19, 2008·9 cites·45 claims
- 1966US7390441B2Sulfonated conducting polymer-grafted carbon material for fuel cell applicationsCOLUMBIAN CHEM·Filed 2004·Granted Jun 24, 2008·9 cites·19 claims
- 2065US7459103B2Conducting polymer-grafted carbon material for fuel cell applicationsCOLUMBIAN CHEM·Filed 2004·Granted Dec 2, 2008·9 cites·14 claims
- 2161US7175930B2Conducting polymer-grafted carbon material for fuel cell applicationsCOLUMBIAN CHEM·Filed 2003·Granted Feb 13, 2007·7 cites·44 claims
- 2260US5168012ACarbon black beads with latex additiveCOLUMBIAN CHEM·Filed 1991·Granted Dec 1, 1992·18 cites·10 claims
- 2358US4262149AProcess for separating alkanols from aqueous calcium chlorideCOLUMBIAN CHEM·Filed 1980·Granted Apr 14, 1981·6 cites·12 claims
- 2456US7238741B2Carbonaceous material with broad aggregate size distribution and improved dispersibilityCOLUMBIAN CHEM·Filed 2004·Granted Jul 3, 2007·5 cites·10 claims
- 2555US2010029475A1Process to Reduce the Pre-Reduction Step for Catalysts for Nanocarbon SynthesisCOLUMBIAN CHEM·Filed 2007·Application pending·0 cites
- 2651US4751069AAutomotive high color carbonCOLUMBIAN CHEM·Filed 1987·Granted Jun 14, 1988·18 cites·9 claims
- 2751US4367208AProcess for the manufacture of battery carbon blackCOLUMBIAN CHEM·Filed 1981·Granted Jan 4, 1983·13 cites·9 claims
- 2847US5009854AAxial reactor with coaxial oil injectionCOLUMBIAN CHEM·Filed 1988·Granted Apr 23, 1991·8 cites·9 claims
- 2942US6608132B1Carbon black with abrasion and hysteresis advantages comparable to N121 and tear properties comparable to N115COLUMBIAN CHEM·Filed 1997·Granted Aug 19, 2003·8 cites·18 claims
- 3042US2006122056A1Process to retain nano-structure of catalyst particles before carbonaceous nano-materials synthesisCOLUMBIAN CHEM·Filed 2004·Application pending·0 cites
- 3141US5069882ACarbon black reactor with a choke extensionCOLUMBIAN CHEM·Filed 1990·Granted Dec 3, 1991·7 cites·4 claims
- 3240US4220042AMeasurement of carbon black dispersionCOLUMBIAN CHEM·Filed 1979·Granted Sep 2, 1980·8 cites·4 claims
- 3339US5256388AMethod for consistently producing carbon black having a high tintCOLUMBIAN CHEM·Filed 1990·Granted Oct 26, 1993·5 cites·1 claims
- 3437US2019002702A1Carbon black composition with sulfur donerCOLUMBIAN CHEM·Filed 2016·Application pending·0 cites
- 3535US5538261AMechanical heat-exchange tube sealing systemCOLUMBIAN CHEM·Filed 1994·Granted Jul 23, 1996·11 cites·20 claims
- 3626US4975267AStable K2 FE22 O34 potassium ferrite phase and method of manufactureCOLUMBIAN CHEM·Filed 1987·Granted Dec 4, 1990·1 cites·9 claims
- 3726US4963343AStable k2 fe22 o34 potassium ferrite phaseCOLUMBIAN CHEM·Filed 1987·Granted Oct 16, 1990·1 cites·3 claims
- 3825US4342736AReduction of the degradation of refractories in a carbon black reactorCOLUMBIAN CHEM·Filed 1981·Granted Aug 3, 1982·1 cites·16 claims
- 3921US6189768B1Process and apparatus for pressing an external sleeve onto a tube for enhancing weld designCOLUMBIAN CHEM·Filed 1999·Granted Feb 20, 2001·0 cites·20 claims
- 4015US4859387ABeader drum methodCOLUMBIAN CHEM·Filed 1988·Granted Aug 22, 1989·3 cites·1 claims
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