Inventor

Keith A. M. Walker

Inventor

Los Altos Hills, CA, US

Overview

1977–2021

Patent span

Chemistry

Primary field (CPC C)

Patents· 45 as inventor

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

C07Dprimary

C07DHeterocyclic compounds32%

C12NMicroorganisms or enzymes13%

C07CAcyclic or carbocyclic compounds9%

A61PSpecific therapeutic activity of chemical compounds or medicinal preparations7%

A61KPreparations for medical, dental or toiletry purposes4%

C07FAcyclic, carbocyclic or heterocyclic compounds containing elements other than carbon, hydrogen, halogen, oxygen, nitrogen, sulfur, selenium or tellurium4%

A01NPreservation of bodies of humans or animals or plants or parts thereof3%

A23DEdible oils or fats, e.g. margarines, shortenings or cooking oils3%

C10LFuels not otherwise provided for3%

C11CFatty acids from fats, oils or waxes3%

PatentTitleYear

11,111,500Mutated protoporphyrinogen IX oxidase (PPX) genes2021 10,815,495Mutated allene oxide synthase 2 (AOS2) genes2020 10,100,334Production of squalene using yeast2018 10,035,991Non-transgenic herbicide resistant plants2018 9,796,938'Fatty acid blends and uses therefor'2017 9,790,515'Mutated allene oxide synthase 2 (AOS2) genes'2017 9,540,662'Methods and compositions for producing squalene using yeast'2017 8,470,568'Methods and compositions for producing squalene using yeast'2013 8,361,173'Fatty acid blends and uses therefor'2013 8,106,259'Compositions and methods for plant genetic modification'2012 8,029,579'Fatty acid blends and uses therefor'2011 6,870,075'Methods of making non-transgenic herbicide resistant plants'2005 5,284,971'4-(3-cyclohexyl-4-hydroxy or-methoxy phenylsulfonyl) 3,5 dibromo phenyl acetic thyromimetic cholesterol-lowering agents'1994 5,192,749'4\'-substituted nucleosides'1993 5,158,949'1,3-Dioxolane derivatives as cholesterol-lowering agents'1992 4,983,627'Novel 6-alkyl and 6.8-dialkylbicyclo(4.2.0)octane derivatives'1991 4,927,963'Novel processes for the synthesis of certain bicyclo(4.2.0)octane derivatives with valuable therapeutic properties'1990 4,921,862'Carbostyril derivatives as combined thromboxane synthetase and cyclic-amp phosphodiesterase inhibitors'1990 4,792,561'Carbostyril derivatives as combined thromboxane synthetase and cyclic-AMP phosphodiesterase inhibitors'1988 4,522,948'Spermicidal substituted 1-(cycloalkyl)alkylimidazoles'1985 4,518,607'Male oral contraceptive N-alkylimidazole derivatives, compositions, and method of use therefor'1985 4,489,087'Spermicidal thioketal substituted N-alkyl imidazoles'1984 4,439,441'Contraceptive compositions and methods employing 1-substituted imidazole derivatives'1984 4,423,057'Methods of use of 1-[(substituted-naphthyl)ethyl]-imidazole derivatives'1983 4,375,474'Dioxalane containing imidazole compounds, compositions and use'1983 4,359,475'Thioketal substituted N-alkyl imidazoles'1982 4,321,272'Derivatives of substituted N-alkylimidazoles'1982 4,293,561'1-(Naphthyl-n-propyl)imidazole derivatives'1981 4,277,486'1-[(Substituted-naphthyl)ethyl]-imidazole derivatives'1981 4,272,545'Derivatives of thienyl- and furyl-substituted N-butyl and N-phenyl imidazoles'1981 4,247,552'Contraceptive compositions and methods employing 1-substituted imidazole derivatives'1981 4,213,991'Derivatives of substituted N-alkyl imidazoles and compositions and methods containing the same'1980 4,172,141'N-(naphthylethyl)imidazole derivatives'1979 4,150,153'1-(Naphthylethyl)imidazole derivatives'1979 4,123,542'Derivatives of N-alkyl imidazoles'1978 4,078,071'Derivatives of substituted N-alkyl imidazoles'1978 4,059,705'Derivatives of substituted n-alkyl imidazoles'1977 4,055,652'1-[.beta.(R-thio)phenethyl]imidazoles and derivatives thereof'1977 4,045,568'Derivatives of substituted N-alkyl imidazoles'1977 4,039,677'Novel 1-phenethylimidazoles'1977 4,038,409'1-Phenethylimidazoles'1977 4,036,970'Imidazol-1-yl propane derivatives'1977 4,036,975'1-[2-(1-Adamantyl)-2-(R-thio)ethyl]imidazoles and 1-[2-(1-adamantyl)-2-(R-oxy)ethyl]imidazoles'1977 4,036,974'1-{2\'-[R\'-Thio(oxy)]-3\'-(R.sup.2 -thio(oxy)]propyl}imidazoles'1977 4,036,973'Imidazol-1-yl propane derivatives'1977

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1977–1994Patents assigned to SYNTEX INC (32)· patent assignee history

1977–1982Based in Palo Alto, CA, US· patent location history

1981–1994Based in Los Altos Hills, CA, US· patent location history

2005–2021Based in San Diego, CA, US· patent location history

2012–2018Patents assigned to BEETHAM PETER R (5)· patent assignee history

2012–2021Patents assigned to CIBUS US LLC (5)· patent assignee history

2012–2018Patents assigned to WALKER KEITH A (4)· patent assignee history

2013–2018Patents assigned to NUCELIS INC (4)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
SYNTEX INC	32	1977–1994
BEETHAM PETER R	5	2012–2018
CIBUS US LLC	5	2012–2021
NUCELIS INC	4	2013–2018
WALKER KEITH Aself	4	2012–2018

Locations

Location	Patents	Span
Los Altos Hills, California, US	18	1981–1994
Palo Alto, California, US	15	1977–1982
San Diego, California, US	12	2005–2021