Inventor · disambiguated record
John E. Hofmann
Also filed as: HOFMANN JOHN E
13 granted patents·1 pending application·1,007 citations·filing 1970–2005
95Inventor score
Files withCLEAN DIESEL TECH INC4FUEL TECH INC4NALCO FUEL TECH4EXXON RESEARCH ENGINEERING CO1VALENTINE JAMES M1
Top patents by PatentIndex Score
14 records- 0197US5976475AReducing NOx emissions from an engine by temperature-controlled urea injection for selective catalytic reductionCLEAN DIESEL TECH INC·Filed 1997·Granted Nov 2, 1999·231 cites·10 claims
- 0296US6361754B1Reducing no emissions from an engine by on-demand generation of ammonia for selective catalytic reductionCLEAN DIESEL TECH INC·Filed 1997·Granted Mar 26, 2002·168 cites·13 claims
- 0396US6203770B1Urea pyrolysis chamber and process for reducing lean-burn engine NOx emissions by selective catalytic reductionCLEAN DIESEL TECH INC·Filed 1999·Granted Mar 20, 2001·143 cites·3 claims
- 0495US5968464AUrea pyrolysis chamber and process for reducing lean-burn engine NOx emissions by selective catalytic reductionCLEAN DIESEL TECH INC·Filed 1997·Granted Oct 19, 1999·146 cites·13 claims
- 0588US5543123ALow pressure formation of a urea hydrolysate for nitrogen oxides reductionNALCO FUEL TECH·Filed 1994·Granted Aug 6, 1996·53 cites·13 claims
- 0683US5048432AProcess and apparatus for the thermal decomposition of nitrous oxideNALCO FUEL TECH·Filed 1990·Granted Sep 17, 1991·44 cites·17 claims
- 0782US4978514ACombined catalytic/non-catalytic process for nitrogen oxides reductionFUEL TECH INC·Filed 1989·Granted Dec 18, 1990·53 cites·19 claims
- 0880US5139754ACatalytic/non-catalytic combination process for nitrogen oxides reductionFUEL TECH INC·Filed 1990·Granted Aug 18, 1992·46 cites·25 claims
- 0978US5658547ASimplified efficient process for reducing NOx, SOx, and particulatesNALCO FUEL TECH·Filed 1995·Granted Aug 19, 1997·41 cites·20 claims
- 1077US5286467AHighly efficient hybrid process for nitrogen oxides reductionFUEL TECH INC·Filed 1992·Granted Feb 15, 1994·37 cites·16 claims
- 1173US4997631AProcess for reducing nitrogen oxides without generating nitrous oxideFUEL TECH INC·Filed 1990·Granted Mar 5, 1991·35 cites·19 claims
- 1248US3936490AProcess for conducting organonitrile addition reactionsEXXON RESEARCH ENGINEERING CO·Filed 1970·Granted Feb 3, 1976·4 cites·10 claims
- 1342US2009004083A1NOx control for IC enginesVALENTINE JAMES M·Filed 2005·Application pending·0 cites
- 1435US5229090AProcess for nitrogen oxides reduction to lowest achievable levelNALCO FUEL TECH·Filed 1991·Granted Jul 20, 1993·6 cites·9 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →