Inventor

Dennis L. Holtermann

Inventor

Crockett, CA, US

Overview

37→

Patents

1990–2018

Patent span

Chemistry

Primary field (CPC C)

Patents· 37 as inventor

Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.

C10Gprimary

C10GCracking hydrocarbon oils27%

B01JChemical or physical processes, e.g. catalysis or colloid chemistry25%

C01BNon-metallic elements17%

C07CAcyclic or carbocyclic compounds12%

Y02PClimate change mitigation technologies in the production or processing of goods5%

C23FNon-mechanical removal of metallic material from surface4%

Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests3%

C08FMacromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds2%

C22BProduction and refining of metals2%

C23GCleaning or de-greasing of metallic material by chemical methods other than electrolysis2%

PatentTitleYear

9,944,736Processes for preparing metallocene-based catalyst systems2018 9,493,592'Processes for preparing metallocene-based catalyst systems'2016 9,347,139'Methods of removing a protective layer'2016 8,569,555'Method of enhancing an aromatization catalyst'2013 8,535,448'Methods of removing a protective layer'2013 8,362,310'Method of enhancing an aromatization catalyst'2013 7,932,425'Method of enhancing an aromatization catalyst'2011 6,551,660'Method for removing reactive metal from a reactor system'2003 6,419,986'Method for removing reactive metal from a reactor system'2002 6,207,042'Reforming using a bound halided zeolite catalyst'2001 6,190,539'Reforming using a bound halided zeolite catalyst'2001 6,005,154'Isomerization process using zeolite SSZ-25'1999 5,914,028'Reforming process with catalyst pretreatment'1999 5,883,031'Low temperature regeneration of coke deactivated reforming catalysts'1999 5,693,215'Low-Aluminum boron beta zeolite'1997 5,691,463'Alkylation process using zeolite SSZ-25'1997 5,591,322'Dewaxing process using zeolite SSZ-25'1997 5,518,607'Sulfur removal systems for protection of reforming catalysts'1996 5,516,421'Sulfur removal'1996 5,439,583'Sulfur removal systems for protection of reforming crystals'1995 5,421,992'Hydrocarbon conversion process using zeolite SSZ-25'1995 5,397,454'Hydrocarbon conversion process using zeolite SSZ-32 having constraint index of 13 or greater'1995 5,393,407'Hydrocarbon conversion utilizing a low-aluminum boron beta zeolite'1995 5,322,615'Method for removing sulfur to ultra low levels for protection of reforming catalysts'1994 5,300,210'Hydrocarbon conversion process using zeolite SSZ-32 as catalyst'1994 5,202,014'Zeolite SSZ-25'1993 5,200,377'Zeolite SSZ-28'1993 5,166,112'Isomerization catalyst and process for its use'1992 5,166,111'Low-aluminum boron beta zeolite'1992 5,155,075'Low temperature regeneration of coke deactivated reforming catalysts'1992 5,149,894'Alkylation using zeolite SSZ-25'1992 5,120,425'Use of zeolite SSZ-33 in hydrocarbon conversion processes'1992 5,114,565'Reforming naphtha with boron-containing large-pore zeolites'1992 5,082,988'Isomerization catalyst and process for its use'1992 5,007,997'Zeolite SSZ-26'1991 4,936,977'Zeolite SSZ-24'1990 4,910,006'Zeolite SSZ-26'1990

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1990–1995Patents assigned to CHEVRON RES (7)· patent assignee history

1990–2003Based in Crockett, CA, US· patent location history

1990Based in Crocket, CA, US· patent location history

1992–1995Patents assigned to CHEVRON RES & TECH (8)· patent assignee history

1995–1999Patents assigned to CHEVRON USA INC (6)· patent assignee history

1999–2001Patents assigned to CHEVRON CHEM CO (4)· patent assignee history

2002–2016Patents assigned to CHEVRON PHILLIPS CHEMICAL CO (7)· patent assignee history

2011–2013Based in Kingwood, TX, US· patent location history

2013–2018Based in Conroe, TX, US· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
CHEVRON RES & TECH	8	1992–1995
CHEVRON PHILLIPS CHEMICAL CO	7	2002–2016
CHEVRON RES	7	1990–1995
CHEVRON USA INC	6	1995–1999
CHEVRON CHEM CO	4	1999–2001

Locations

Location	Patents	Span
Crockett, California, US	29	1990–2003
Conroe, Texas, US	4	2013–2018
Kingwood, Texas, US	3	2011–2013
Crocket, California, US	1	1990