Assignee
ENGELHARD CORP
US640 patents
Top patents by PatentIndex Score
US6238643B1May 29, 2001
Method and device for the production of an aqueous solution containing chlorine dioxide
ENGELHARD CORP150 citations99
US6176078B1Jan 23, 2001
Plasma fuel processing for NOx control of lean burn engines
ENGELHARD CORP214 citations99
US6125629AOct 3, 2000
Staged reductant injection for improved NOx reduction
ENGELHARD CORP303 citations99
US6105365AAug 22, 2000
Apparatus, method, and system for concentrating adsorbable pollutants and abatement thereof
ENGELHARD CORP197 citations99
US5516497AMay 14, 1996
Staged metal-promoted zeolite catalysts and method for catalytic reduction of nitrogen oxides using the same
ENGELHARD CORP289 citations99
US5462907AOct 31, 1995
Ceria-alumina oxidation catalyst
ENGELHARD CORP137 citations99
US5422331AJun 6, 1995
Layered catalyst composition
ENGELHARD CORP161 citations99
US5254519AOct 19, 1993
Catalyst composition containing platinum and rhodium components
ENGELHARD CORP143 citations99
US5057483AOct 15, 1991
Catalyst composition containing segregated platinum and rhodium components
ENGELHARD CORP252 citations99
US5024981AJun 18, 1991
Staged metal-promoted zeolite catalysts and method for catalytic reduction of nitrogen oxides using the same
ENGELHARD CORP138 citations99
US4727052AFeb 23, 1988
Catalyst compositions and methods of making the same
ENGELHARD CORP162 citations99
US4714694ADec 22, 1987
Aluminum-stabilized ceria catalyst compositions, and methods of making the same
ENGELHARD CORP201 citations99
US7022646B2Apr 4, 2006
Layered catalyst composite
ENGELHARD CORP76 citations98
US6912847B2Jul 5, 2005
Diesel engine system comprising a soot filter and low temperature NOx trap
ENGELHARD CORP91 citations98
US6777370B2Aug 17, 2004
SOx tolerant NOx trap catalysts and methods of making and using the same
ENGELHARD CORP133 citations98
US6764665B2Jul 20, 2004
Layered catalyst composite
ENGELHARD CORP168 citations98
US6699404B2Mar 2, 2004
Massive bodies containing free halogen source for producing highly converted solutions of chlorine dioxide
ENGELHARD CORP82 citations98
US6497750B2Dec 24, 2002
Pressure swing adsorption process
ENGELHARD CORP106 citations98
US6432322B1Aug 13, 2002
Massive bodies for producing highly converted solutions of chlorine dioxde
ENGELHARD CORP81 citations98
US6363716B1Apr 2, 2002
Plasma fuel processing for NOx control lean burn engines
ENGELHARD CORP96 citations98
US6248684B1Jun 19, 2001
Zeolite-containing oxidation catalyst and method of use
ENGELHARD CORP129 citations98
US6093378AJul 25, 2000
Four-way diesel exhaust catalyst and method of use
ENGELHARD CORP192 citations98
US6087298AJul 11, 2000
Exhaust gas treatment system
ENGELHARD CORP252 citations98
US6077495AJun 20, 2000
Method, composition and system for the controlled release of chlorine dioxide gas
ENGELHARD CORP123 citations98
US5948723ASep 7, 1999
Layered catalyst composite
ENGELHARD CORP141 citations98
US5948377ASep 7, 1999
Catalyst composition
ENGELHARD CORP96 citations98
US5804155ASep 8, 1998
Basic zeolites as hydrocarbon traps for diesel oxidation catalysts
ENGELHARD CORP111 citations98
US5597771AJan 28, 1997
Layered catalyst composite
ENGELHARD CORP314 citations98
US5491120AFeb 13, 1996
Oxidation catalyst with bulk ceria, a second bulk metal oxide, and platinum
ENGELHARD CORP176 citations98
US5357908AOct 25, 1994
Fuel modification method and apparatus for reduction of pollutants emitted from internal combustion engines
ENGELHARD CORP139 citations98
US5243095ASep 7, 1993
Hydrogenation catalyst, process for preparing and process for using said catalyst
ENGELHARD CORP148 citations98
US4961917AOct 9, 1990
Method for reduction of nitrogen oxides with ammonia using promoted zeolite catalysts
ENGELHARD CORP463 citations98
US4844837AJul 4, 1989
Catalytic partial oxidation process
ENGELHARD CORP157 citations98
US4493902AJan 15, 1985
Fluid catalytic cracking catalyst comprising microspheres containing more than about 40 percent by weight Y-faujasite and methods for making
ENGELHARD CORP159 citations98
US4335023AJun 15, 1982
Monolithic catalyst member and support therefor
ENGELHARD CORP201 citations98
US7189376B2Mar 13, 2007
Multi-zoned catalyst and trap
ENGELHARD CORP66 citations97
US6656347B2Dec 2, 2003
Structurally enhanced cracking catalysts
ENGELHARD CORP76 citations97
US6569393B1May 27, 2003
Method and device for cleaning the atmosphere
ENGELHARD CORP82 citations97
US6497851B1Dec 24, 2002
Engine exhaust treatment apparatus and method of use
ENGELHARD CORP90 citations97
US6444012B1Sep 3, 2002
Selective removal of nitrogen from natural gas by pressure swing adsorption
ENGELHARD CORP116 citations97
US6294108B1Sep 25, 2001
Composition for the controlled release of chlorine dioxide gas
ENGELHARD CORP86 citations97
US6274107B1Aug 14, 2001
Zeolite-containing oxidation catalyst and method of use
ENGELHARD CORP99 citations97
US6190627B1Feb 20, 2001
Method and device for cleaning the atmosphere
ENGELHARD CORP92 citations97
US6074973AJun 13, 2000
Catalyzed hydrocarbon trap material and method of making the same
ENGELHARD CORP124 citations97
US5989507ANov 23, 1999
Catalyst composition
ENGELHARD CORP112 citations97
US5898014AApr 27, 1999
Catalyst composition containing oxygen storage components
ENGELHARD CORP124 citations97
US5792436AAug 11, 1998
Method for using a regenerable catalyzed trap
ENGELHARD CORP129 citations97
US5721188AFeb 24, 1998
Thermal spray method for adhering a catalytic material to a metallic substrate
ENGELHARD CORP122 citations97
US4522894AJun 11, 1985
Fuel cell electric power production
ENGELHARD CORP410 citations97
US7276212B2Oct 2, 2007
Exhaust articles for internal combustion engines
ENGELHARD CORP102 citations96
Showing the top 50 of 640 patents by PatentIndex Score.