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Inventor

Ryuichiro Tsumura

Inventor
Yokohama, JP

Overview

3→
Patents
1978–1992
Patent span
Chemistry
Primary field (CPC C)

Patents· 3 as inventor

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

C07Dprimary
C07DHeterocyclic compounds67%
C07CAcyclic or carbocyclic compounds33%
PatentTitleYear
5,175,309'Preparation process of N-substituted maleimides'19925,068,357'Preparation of N-substituted maleimides by use of tin catalysts'19914,080,391'Process for the production of alcohols'1978

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1978–1992Patents assigned to MITSUI TOATSU CHEMICALS (3)· patent assignee history
1978Based in Fujisawa, JP· patent location history
1991–1992Based in Yokohama, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
MITSUI TOATSU CHEMICALS31978–1992
Locations
LocationPatentsSpan
Yokohama, JP21991–1992
Fujisawa, JP11978