Inventor

Derek H. R. Barton

Inventor

Gif sur Yvette, FR

Overview

42→

Patents

1976–2000

Patent span

Chemistry

Primary field (CPC C)

Patents· 42 as inventor

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

C07Cprimary

C07CAcyclic or carbocyclic compounds21%

C07DHeterocyclic compounds21%

C07JSteroids21%

G03CPhotosensitive materials for photographic purposes5%

A61PSpecific therapeutic activity of chemical compounds or medicinal preparations4%

C07BGeneral methods of organic chemistry4%

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

A61KPreparations for medical, dental or toiletry purposes3%

C07HSugars3%

C11BProducing, e.g. by pressing raw materials or by extraction from waste materials, refining or preserving fats, fatty substances, e.g. lanolin, fatty oils or waxes3%

PatentTitleYear

6,093,812'Process for the stereospecific synthesis of azetidinones'2000 5,756,852'Co-oxidation of H.sub.2 S and saturated hydrocarbons'1998 5,473,085'Production of (-)dodecahydro-3a,6,6,9a-tetramethyl-naphtho[2,1-b] furan'1995 5,472,957'Chemical compounds and process'1995 5,463,089'Preparation of ambrox'1995 5,283,271'3,5-diphenyl or substituted 3,5-diphenyl-1-hydroxy-1,2-dihydroimidazole-2-thiones'1994 4,868,307'Derivatives of bicyclic aminocarboxylic acids'1989 4,689,410'Novel 23-dihydro-oxazolyl steroids'1987 4,670,190'1-.alpha.-hydroxy vitamin D compounds and process for preparing same'1987 4,668,356'Photolytic process for the formation of carbon-containing free radicals and its applications to free radical polymerization in particular'1987 4,621,156'Optical filter agents and photographic products and processes containing same'1986 4,529,437'Herbicides'1985 4,501,701'20-Isocyano-.DELTA..sup.17(20) -steroids'1985 4,490,296'Compositions and method'1984 4,471,137'Highly sterically hindered guanidines and process for the production thereof'1984 4,468,494'Polymeric pH-sensitive optical filter agents having hydrazone moieties attached thereto'1984 4,434,080'Dehydrogenation agents based on derivatives of selenium and their use in the dehydrogenation in the 1,4 positions of steroids'1984 4,401,596'Novel 17-oxazoline-steroids'1983 4,370,497'Oxidation process using tellurium oxide catalysts'1983 4,339,593'Process for the manufacture of 3,6-dialkyl resorcylic acid esters'1982 4,298,676'Optical filter agents and photographic products and processes containing same'1981 4,284,558'Chemical process for fluorinating a tertiary carbon atom in the steroid nucleus'1981 4,269,925'Polymeric optical filter agents and photographic products and processes containing same'1981 4,267,111'Process for preparing .beta.-(3-exo-hydroxy-endo-2,3-dimethyl-2-norbornyl)-propionic acid .delta .'1981 4,261,866'Spirodienones and spirocyclic ketones'1981 4,234,515'Preparation of N,N-difluoroamines'1980 4,223,167'Processes for preparing .beta.-santalol, .beta.-santalene dihydro-.beta.-santalol and related compounds'1980 4,220,588'Chemical processes'1980 4,203,925'Process for the production of spirodienones and spirocyclic ketones'1980 4,193,917'Chemical compounds'1980 4,181,655'5(3-Substituted aminopropyl)-10-trifluoromethoxy-5H-dibenz[b,f]azepines'1980 4,174,318'Alkylative cleavage of azetidinone disulfides'1979 4,159,326'Hydrogenation process for the preparation of 5,6 cis- and 5,6-trans-10,19-dihydro-vitamin D compounds using transistion metal catalysts'1979 4,078,139'Process for deoxygenating secondary alcohols'1978 4,064,148'Chemical process for preparing .DELTA.9(11) dehydrosteroids'1977 4,036,864'Chemical process'1977 4,011,316'Cyclohexa-2,5-diene-1-thiones'1977 3,991,103'5H Dibenzo (a,d) cycloheptene, 10,11 dihydro, 5(1-halo-3-dimethylaminoprop-1-ylidene) derivatives'1976 3,991,069'Certain thiazolo azetidinone compounds'1976 3,954,980'Chemical compounds'1976 3,953,424'Azetitin-2-ores and process for preparing same'1976 3,930,970'Photolysis of alcohol nitrites'1976

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1976–1995Patents assigned to RES INST MEDICINE CHEM (10)· patent assignee history

1976–1980Patents assigned to GLAXO LAB LTD (4)· patent assignee history

1976–1987Based in London, GB· patent location history

1980–1982Patents assigned to FRITZSCHE DODGE & OLCOTT INC (5)· patent assignee history

1980–1987Based in Gif sur Yvette, FR· patent location history

1981–1986Patents assigned to POLAROID CORP (4)· patent assignee history

1983–1987Patents assigned to ROUSSEL UCLAF (5)· patent assignee history

1989–2000Based in College Station, TX, US· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
RES INST MEDICINE CHEM	10	1976–1995
FRITZSCHE DODGE & OLCOTT INC	5	1980–1982
ROUSSEL UCLAF	5	1983–1987
GLAXO LAB LTD	4	1976–1980
POLAROID CORP	4	1981–1986

Locations

Location	Patents	Span
Gif sur Yvette, FR	18	1980–1987
London, GB	17	1976–1987
College Station, Texas, US	7	1989–2000