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Inventor

Kouichi Katayama

Inventor
Ibaraki, JP

Overview

21→
Patents
1983–1996
Patent span
Chemistry
Primary field (CPC C)

Patents· 21 as inventor

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

C07Dprimary
C07DHeterocyclic compounds32%
C07FAcyclic, carbocyclic or heterocyclic compounds containing elements other than carbon, hydrogen, halogen, oxygen, nitrogen, sulfur, selenium or tellurium22%
A61PSpecific therapeutic activity of chemical compounds or medicinal preparations19%
A61KPreparations for medical, dental or toiletry purposes16%
C07CAcyclic or carbocyclic compounds8%
C12NMicroorganisms or enzymes3%
PatentTitleYear
5,527,948'Naphthalene derivative'19965,482,937'1,4-diazepine derivative and its pharmaceutical use'19965,476,864'Glycerin derivative and its pharmacological use'19955,476,863'Glycerin derivative and its pharmacological use'19955,468,740'1,4-diazepine derivative and its pharmaceutical use'19955,438,045'1,4-diazepine derivative and its pharmaceutical use'19955,409,909'1,4-diazepine derivative and its pharmaceutical use'19955,382,579'Triazolo-1,4-diazepine derivatives and their use in pharmaceuticals'19955,304,553'1,4-diazepine derivative and its pharmaceutical use'19945,298,649'Naphthalene derivative'19945,273,985'Glycerin derivative and its pharmacological use'19935,221,671'Triazolo-1,4-diazepine derivatives and their use in pharmaceuticals'19935,134,111'Naphthalene derivative'19925,037,827'Glycerin derivative and its pharmacological use'19914,833,160'3-(3,5-di-tert-butyl-4-hydroxy benzylidene)-2-pyrrolidone and substituted derivatives thereof'19894,791,105'Therapeutic and preventive agent containing dolichol'19884,636,381'Coated ubidecarenone-containing liposome'19874,613,593'Therapeutic and preventive agent containing dolichol'19864,603,126'Therapeutic and preventive agent containing dolichol'19864,599,328'Therapeutic and preventive agent containing dolichol'19864,397,951'Elastase-containing composition permitting elastase to be absorbed in increased amount'1983

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1983–1996Patents assigned to EISAI CO LTD (20)· patent assignee history
1983Based in Tokyo, JP· patent location history
1986–1988Based in Sakuramura, JP· patent location history
1986Based in Ibaragi, JP· patent location history
1987–1996Based in Ibaraki, JP· patent location history
1992–1996Based in Tsukuba, JP· patent location history
1996Patents assigned to EISAI CORP LTD (1)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
EISAI CO LTD201983–1996
EISAI CORP LTD11996
Locations
LocationPatentsSpan
Ibaraki, JP131987–1996
Tsukuba, JP31992–1996
Sakuramura, JP31986–1988
Ibaragi, JP11986
Tokyo, JP11983