Inventor
Helmut Meidert
Inventor
Frankfurt am Main, DE
Overview
Patents· 5 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
C07Dprimary
C07DHeterocyclic compounds40%
C07CAcyclic or carbocyclic compounds30%
C09BOrganic dyes or closely-related compounds for producing dyes, e.g. pigments20%
C01BNon-metallic elements10%
PatentTitleYear
4,487,971'Process for the isolation of crystalline 1,3-cylohexanedione'19844,277,606'8-Oxo-5,6,7,8-tetrahydro-2-quinolone and process for the preparation thereof'19814,226,997'8-Chloro-5,6,7,8-tetrahydro-2-quinolone and 8-bromo-5,6,7,8-tetrahydro-2-quinolone, the hydrochloride or hydrobromide thereof and process for their manufacture'19804,041,049'Process for the manufacture of cyclohexane-1,3-diones and 6-alkyl-3,4-dihydro-2-pyranones'19773,931,309'Process for the preparation of carbon tetrachloride and phosgene'1976Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1976–1984Patents assigned to HOECHST AG (5)· patent assignee history
1976–1984Based in Frankfurt am Main, DE· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| HOECHST AG | 5 | 1976–1984 |
Locations
| Location | Patents | Span |
|---|---|---|
| Frankfurt am Main, DE | 5 | 1976–1984 |