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Inventor

Rudolf Helm

Inventor
Bergisch Gladbach, DE

Overview

3→
Patents
1977–1996
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.

C07Cprimary
C07CAcyclic or carbocyclic compounds50%
C08GMacromolecular compounds obtained otherwise than by reactions only involving unsaturated carbon-to-carbon bonds17%
C12CBeer17%
Y02PClimate change mitigation technologies in the production or processing of goods17%
PatentTitleYear
5,502,256'Process for preparing 2,2\'-dinitrodiphenyl disulphide'19964,400,560'Process for the preparation of a mixture of low-molecular weight polyhoric alcohols'19834,034,042'Process for the production of 4-nitroso-diphenylamine'1977

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1977–1996Patents assigned to BAYER AG (3)· patent assignee history
1977Based in Cologne, DE· patent location history
1983–1996Based in Bergisch Gladbach, DE· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
BAYER AG31977–1996
Locations
LocationPatentsSpan
Bergisch Gladbach, DE21983–1996
Cologne, DE11977