Inventor

Ka-Kong Chan

Inventor

Hopatcong, NJ, US

Overview

40→

Patents

1976–1992

Patent span

Chemistry

Primary field (CPC C)

Patents· 40 as inventor

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

C07Dprimary

C07DHeterocyclic compounds41%

C07CAcyclic or carbocyclic compounds32%

C07FAcyclic, carbocyclic or heterocyclic compounds containing elements other than carbon, hydrogen, halogen, oxygen, nitrogen, sulfur, selenium or tellurium13%

C07BGeneral methods of organic chemistry9%

A61KPreparations for medical, dental or toiletry purposes1%

A61PSpecific therapeutic activity of chemical compounds or medicinal preparations1%

B82YSpecific uses or applications of nanostructures1%

C12CBeer1%

Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests1%

PatentTitleYear

5,147,871'Anti-bacterial cephalosporin compounds'1992 4,913,851'Asymmetric synthesis of natural vitamin E.'1990 4,914,217'Asymmetric synthesis of natural vitamin E'1990 4,900,476'Quinone intermediates for asymmetric synthesis of natural vitamin E'1990 4,898,953'Natural Vitamin E intermediate'1990 4,898,962'Natural vitamin E intermediate'1990 4,855,085'Asymmetric synthesis of natural vitamin E'1989 4,831,185'Asymmetric synthesis of natural vitamin E'1989 4,642,364'Unsaturated eicosanoic acids'1987 4,599,443'Unsaturated eicosanoic acids'1986 4,500,462'Unsaturated eicosanoic acids'1985 4,395,575'5(Halophenyl)-2-fluoro-pentadienals'1983 4,375,563'Fluorinated aromatic polyenes'1983 4,345,084'Unsaturated eicosanoic acids'1982 4,338,253'Fluorinated aromatic polyenes'1982 4,335,248'Fluorinated polyenes'1982 4,321,209'Fluorinated aromatic polyenes'1982 4,299,995'Fluorinated polyenes'1981 4,266,073'Fluorinated aromatic polyenes'1981 4,231,944'Fluorinated polyenes'1980 4,201,727'Fluorinated aromatic polyenes'1980 4,171,318'Fluorinated polyenes'1979 4,169,100'Fluorinated aromatic polyenes'1979 4,160,865'Asymmetric synthesis'1979 4,151,360'Optically active amine salts'1979 4,137,246'Fluorinated aromatic polyenes'1979 4,110,346'Tetramethyl chromanyl pentane derivatives'1978 4,102,909'Optically active esters and amides'1978 4,100,175'Claisen intermediates'1978 4,097,495'Tetramethyl-benzyloxy chromans'1978 4,094,892'Process for preparing optically active esters'1978 4,094,885'6(6-Substituted-2,5,7,8-tetramethyl-2-chromanyl)-3-methyl-4-hexenoic acid derivatives'1978 4,093,632'6(6-Substituted-2,5,7,8-tetramethyl-2-chromanyl)-3-methyl hexanol derivatives'1978 4,088,662'Optically active amides and process for producing the same'1978 4,086,249'Tetramethyl chromanyl pentane amide'1978 4,076,739'Synthesis of vitamin E'1978 4,045,475'Optically active alcohols and lower esters thereof'1977 4,029,678'Asymmetric synthesis'1977 4,016,178'Synthesis of vitamin E'1977 4,000,169'Asymmetric synthesis of optically active compounds'1976

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1976–1992Patents assigned to HOFFMANN LA ROCHE (40)· patent assignee history

1976–1979Based in Stanhope, NJ, US· patent location history

1979–1992Based in Hopatcong, NJ, US· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
HOFFMANN LA ROCHE	40	1976–1992

Locations

Location	Patents	Span
Hopatcong, New Jersey, US	24	1979–1992
Stanhope, New Jersey, US	16	1976–1979