Inventor
Gerd Siekmann
Inventor
Cologne, DE
Overview
Patents· 5 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
C07Cprimary
C07CAcyclic or carbocyclic compounds50%
C07DHeterocyclic compounds33%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests17%
PatentTitleYear
4,988,829'Process for the preparation of 2-(4-chlorophenylethyl)-2-tert.-butyl-oxirane'19914,344,897'Process for the preparation of percarboxylic acid solutions'19824,313,879'Process for the manufacture of very pure .epsilon.-caprolactone'19824,089,892'Process for the preparation of percarboxylic acid solutions'19784,088,676'Process for the preparation of organic solutions of percarboxylic acids'1978Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1978–1991Patents assigned to BAYER AG (3)· patent assignee history
1978–1982Patents assigned to DEGUSSA (2)· patent assignee history
1978Based in Leverkusen, DE· patent location history
1982–1991Based in Cologne, DE· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| BAYER AG | 3 | 1978–1991 |
| DEGUSSA | 2 | 1978–1982 |
Locations
| Location | Patents | Span |
|---|---|---|
| Cologne, DE | 3 | 1982–1991 |
| Leverkusen, DE | 2 | 1978 |