Dufresne; Pierre

Patent Applications and Registrations

Patent applications and USPTO patent grants for Dufresne; Pierre.The latest application filed is for "process for limiting self-heating of activated catalysts".

Company Profile

9.43.27

Dufresne; Pierre - Aouste sur Sye FR
Dufresne; Pierre - Acouste sur Sye FR
Dufresne; Pierre - Valence FR
Dufresne; Pierre - La Ferte St Aubin FR
Dufresne; Pierre - Rueil Malmaison FR

*profile and listings may contain filings by different individuals or companies with the same name. Review application materials to confirm ownership/assignment.

Patent Activity

Patent	Date
Method for compositional sorting of catalyst or adsorbent in mixtures of catalysts and/or adsorbents Grant 10,828,632 - Gauthier , et al. November 10, 2	2020-11-10
Process for producing hydrogen sulfide in a circulating catalytic bed reactor Grant 10,737,939 - Dufresne , et al. A	2020-08-11
Method for limiting the emission of dust from catalyst grains Grant 10,369,560 - Galliou , et al.	2019-08-06
Method for sorting contaminated catalysts or adsorbents Grant 10,279,377 - Gauthier , et al.	2019-05-07
Process for Limiting Self-Heating of Activated Catalysts App 20190105649 - Dufresne; Pierre ; et al.	2019-04-11
Process for limiting the emissions of gases from porous particles Grant 10,207,251 - Dufresne , et al. Feb	2019-02-19
Process for limiting self heating of activated catalysts Grant 10,195,601 - Dufresne , et al. Fe	2019-02-05
Process For Producing Hydrogen Sulfide In A Circulating Catalytic Bed Reactor App 20180312402 - DUFRESNE; Pierre ; et al.	2018-11-01
Method for completely emptying a catalytic reactor Grant 10,065,164 - Darcissac , et al. September 4, 2	2018-09-04
Method for completely emptying a catalytic reactor Grant 10,065,165 - Darcissac , et al. September 4, 2	2018-09-04
Method For Compositional Sorting Of Catalyst Or Adsorbent In Mixtures Of Catalysts And/or Adsorbents App 20180161767 - GAUTHIER; Thierry ; et al.	2018-06-14
Method For Sorting Contaminated Catalysts Or Adsorbents App 20180154397 - GAUTHIER; Thierry ; et al.	2018-06-07
Process for the start-up of hydrotreatment or hydroconversion units Grant 9,982,202 - Dufresne May 29, 2	2018-05-29
Process for passivation by a nitrogen-containing compound of a zeolitic catalyst, in particular a hydrocracking catalyst Grant 9,943,835 - Dufresne , et al. April 17, 2	2018-04-17
Process For Limiting The Emissions Of Gases From Porous Particles App 20170182476 - DUFRESNE; Pierre ; et al.	2017-06-29
Method For Limiting The Emission Of Dust From Catalyst Grains App 20170157603 - GALLIOU; Pauline ; et al.	2017-06-08
Method for preparing supported metal catalysts for hydrogenating unsaturated hydrocarbons Grant 9,533,288 - Dufresne , et al. January 3, 2	2017-01-03
Method for Completely Emptying a Catalytic Reactor App 20160375418 - Darcissac; Jean ; et al.	2016-12-29
Method for Completely Emptying a Catalytic Reactor App 20160375417 - Darcissac; Jean ; et al.	2016-12-29
Process for the start-up of hydrotreatment or hydroconversion units Grant 9,434,893 - Dufresne September 6, 2	2016-09-06
Process For The Start-up Of Hydrotreatment Or Hydroconversion Units App 20160152901 - DUFRESNE; Pierre	2016-06-02
Process for Limiting Self Heating of Activated Catalysts App 20160001279 - Dufresne; Pierre ; et al.	2016-01-07
Process For The Start-up Of Hydrotreatment Or Hydroconversion Units App 20140251870 - DUFRESNE; Pierre	2014-09-11
Process for the off site regeneration of solid catalysts Grant 8,772,191 - Kerleau , et al. July 8, 2	2014-07-08
Method For Preparing Supported Metal Catalysts For Hydrogenating Unsaturated Hydrocarbons App 20140155664 - Dufresne; Pierre ; et al.	2014-06-05
Process for passivation by a nitrogen-containing compound of a zeolitic catalyst, in particular a hydrocracking catalyst App 20140042057 - Dufresne; Pierre ; et al.	2014-02-13
Process for sulfurizing hydrocarbon treatment catalysts Grant 8,598,059 - Dufresne , et al. December 3, 2	2013-12-03
Process for the regeneration of catalysts for the treatment of hydrocarbons Grant 8,377,839 - Galliou , et al. February 19, 2	2013-02-19
Colour sorting of catalyst or adsorbent particles Grant 8,307,985 - Dufresne , et al. November 13, 2	2012-11-13
Process for sulfurizing hydrocarbon treatment catalysts Grant 8,283,278 - Dufresne , et al. October 9, 2	2012-10-09
Process for the regeneration of catalysts for the treatment of hydrocarbons Grant 8,278,234 - Galliou , et al. October 2, 2	2012-10-02
Process For The Off Site Regeneration Of Solid Catalysts App 20120231947 - Kerleau; Philippe ; et al.	2012-09-13
Process for sulfurization or presulfurization of solid particles of a catalyst or an adsorbent Grant 8,088,705 - Dufresne , et al. January 3, 2	2012-01-03
Process For Sulfurizing Hydrocarbon Treatment Catalysts App 20110098175 - Dufresne; Pierre ; et al.	2011-04-28
Process For Sulfurizing Hydrocarbon Treatment Catalysts App 20110092360 - Dufresne; Pierre ; et al.	2011-04-21
Off-site treatment for hydrogenation catalysts Grant 7,713,905 - Dufresne , et al. May 11, 2	2010-05-11
Process For The Regeneration Of Catalysts For The Treatment Of Hydrocarbons App 20100105540 - Galliou; Pauline ; et al.	2010-04-29
Process For The Regeneration Of Catalysts For The Treatment Of Hydrocarbons App 20100105541 - Galliou; Pauline ; et al.	2010-04-29
Passivation of sulphur hydroconversion catalyst Grant 7,582,587 - Dufresne , et al. September 1, 2	2009-09-01
Oxidizing heat treatment passivation of sulphide hydrotreatment catalyst Grant 7,501,376 - Dufresne , et al. March 10, 2	2009-03-10
Colour Sorting Of Catalyst Or Adsorbent Particles App 20090000992 - Dufresne; Pierre ; et al.	2009-01-01
Process for sulfurization or presulfurization of solid particles of a catalyst or an adsorbent App 20080312076 - DUFRESNE; Pierre ; et al.	2008-12-18
Off-site treatment for hydrogenation catalysts App 20070032372 - Dufresne; Pierre ; et al.	2007-02-08
Oxidizing heat treatment passivation of sulphide hydrotreatment catalyst App 20060154813 - Dufresne; Pierre ; et al.	2006-07-13
Passivation of sulphur hydroconversion catalyst App 20060154812 - Dufresne; Pierre ; et al.	2006-07-13
Off-site regeneration of reforming catalysts App 20050148456 - Dufresne, Pierre ; et al.	2005-07-07
Process for sulfiding an additive-containing catalyst Grant 6,753,291 - Eijsbouts , et al. June 22, 2	2004-06-22
Ex-situ presulfuration in the presence of hydrocarbon molecule Grant 6,417,134 - Dufresne , et al. July 9, 2	2002-07-09
Ex-situ presulfuration in the presence of a hydrocarbon molecule App 20020037806 - Dufresne, Pierre ; et al.	2002-03-28
Process for sulfiding an additive-containing catalyst App 20020013223 - Eijsbouts, Sonja ; et al.	2002-01-31
Process for incorporating sulfur into the pores of a hydrocarbon treatment catalyst Grant 6,100,216 - Dufresne , et al. August 8, 2	2000-08-08
Process for off-site preconditioning of a hydrocarbon processing catalyst Grant 6,077,803 - Dufresne , et al. June 20, 2	2000-06-20
Process for presulfurizing hydrotreatment catalysts Grant 5,922,638 - Dufresne , et al. July 13, 1	1999-07-13
Offsite regeneration process for a catalyst containing at least one precious metal Grant 5,854,162 - Dufresne , et al. December 29, 1	1998-12-29
Light generator for introducing light into optical fibers Grant 5,803,575 - Ansems , et al. September 8, 1	1998-09-08
Process for starting a hydrocarbon conversion by the prior treatment of the catalyst with a sulphur agent and then diluted hydrogen Grant 5,654,252 - Dufresne , et al. August 5, 1	1997-08-05
Heat treatment of solid catalyst or adsorbent particles in the presence of fluid in a vibrating helical coil Grant 5,592,748 - Mitzkat , et al. January 14, 1	1997-01-14
Process for eliminating mercury and possibly arsenic in hydrocarbons Grant 5,401,392 - Courty , et al. March 28, 1	1995-03-28
Process for the presulphurization of hydrocarbon treatment catalysts Grant 5,397,756 - Dufresne , et al. March 14, 1	1995-03-14
Method of hydrocracking paraffins emanating from the Fischer-Tropsch process using catalysts based on H-Y zeolite Grant 5,345,019 - Bigeard , et al. September 6, 1	1994-09-06
Catalytic cracking process Grant 4,784,750 - Dufresne , et al. November 15, 1	1988-11-15
Catalyst for oil hydrorefining or mild hydrocracking of heavy oil charges to produce middle distillates Grant 4,766,099 - Dufresne , et al. August 23, 1	1988-08-23
Novel hydrocracking or cracking catalyst for hydrocarbon charges Grant 4,738,940 - Dufresne , et al. April 19, 1	1988-04-19
Hydrocracking catalyst for the production of middle distillates Grant 4,738,941 - Dufresne , et al. April 19, 1	1988-04-19
Process for dismutation and transalkylation of aromatic hydrocarbons in the presence of a zeolite catalyst Grant 4,723,048 - Dufresne , et al. February 2, 1	1988-02-02

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