Inventor

Darrell W. Walker

Inventor

Bartlesville, OK, US

Overview

26→

Patents

1977–1998

Patent span

Chemistry

Primary field (CPC C)

Patents· 26 as inventor

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

B01Jprimary

B01JChemical or physical processes, e.g. catalysis or colloid chemistry36%

C07CAcyclic or carbocyclic compounds29%

Y02PClimate change mitigation technologies in the production or processing of goods15%

C10GCracking hydrocarbon oils12%

C01FCompounds of the metals beryllium, magnesium, aluminium, calcium, strontium, barium, radium, thorium, or of the rare-earth metals2%

C01GCompounds containing metals not covered by subclasses c01d or c01f2%

C01PIndexing scheme relating to structural and physical aspects of solid inorganic compounds2%

C07BGeneral methods of organic chemistry2%

Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests2%

PatentTitleYear

5,733,518'Process and catalyst for dehydrogenation of organic compounds'1998 5,439,859'Process and catalyst for dehydrogenation of organic compounds'1995 5,414,157'Catalytic oxidation of alkanes'1995 5,386,074'Catalytic dehydrogenation of alkanes'1995 5,345,011'New manganese catalyst for light alkane oxidation'1994 5,345,010'Chromia on metal oxide for the oxidation of alkane to alcohol'1994 5,220,080'Chromia on metal oxide catalysts for the oxidation of methane to methanol'1993 5,132,472'Catalytic oxidation of alkanes'1992 4,918,249'Silicometallate molecular sieves and their use as catalysts in oxidation of alkanes'1990 4,873,211'Cracking catalyst and process'1989 4,846,960'Catalytic cracking'1989 4,794,095'Catalytic cracking catalyst'1988 4,793,914'Passivation of metal contaminated cracking catalysts'1988 4,765,884'Cracking catalyst and process'1988 4,727,053'Passivation of metal contaminated cracking catalysts'1988 4,484,015'Selective hydrogenation'1984 4,404,124'Selective hydrogenation catalyst'1983 4,370,310'Zinc aluminate prepared using an alumina hydrate'1983 4,263,133'Catalytic reforming and hydrocracking of organic compounds employing zinc titanate as the catalytic agent'1981 4,252,680'Oxidative dehydrogenation catalyst preparation'1981 4,228,040'Lithium- or magnesium-promoted zinc titanate catalyst for dehydrogenation of hydrocarbons'1980 4,218,346'Zinc titanate catalyst for dehydrogenation of hydrocarbons'1980 4,218,343'Dehydrogenation of organic compounds'1980 4,176,140'Dehydrogenation of hydrocarbons with zinc titanate catalyst'1979 4,144,277'Dehydrogenation of hydrocarbons with zinc titanate catalyst'1979 4,010,114'Oxidative dehydrogenation catalyst'1977

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1977–1989Patents assigned to PHILLIPS PETROLEUM CO (17)· patent assignee history

1977–1984Based in Bartlesville, OK, US· patent location history

1988–1992Based in Media, PA, US· patent location history

1990–1992Patents assigned to SUN REFINING & MARKETING (2)· patent assignee history

1993–1998Patents assigned to SUN CO INC R & M (7)· patent assignee history

1993–1998Based in Visalia, CA, US· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
PHILLIPS PETROLEUM CO	17	1977–1989
SUN CO INC R & M	7	1993–1998
SUN REFINING & MARKETING	2	1990–1992

Locations

Location	Patents	Span
Bartlesville, OK, US	11	1977–1984
Media, Pennsylvania, US	8	1988–1992
Visalia, California, US	7	1993–1998