Inventor
Rudolf Oberkobusch
Inventor
Duisburg, DE
Overview
Patents· 5 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
C07Dprimary
C07DHeterocyclic compounds33%
C07CAcyclic or carbocyclic compounds17%
C08LCompositions of macromolecular compounds17%
C10CWorking-up pitch, asphalt, bitumen, tar17%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests17%
PatentTitleYear
4,900,717'Recovery of 2,6-dialkyl-naphthalene isomers'19904,871,443'Novel method for extraction of salts from coal tar and pitches'19894,523,016'Process for the catalytic dehydrogenation of piperidine'19854,304,606'Plasticized coal tar pitch, composition containing same and its use'19813,991,074'Process for the catalytic conversion of o-ethylaniline to indole'1976Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1976–1990Patents assigned to RUETGERSWERKE AG (5)· patent assignee history
1976Based in Duisburg-Meiderich, DT· patent location history
1981–1990Based in Duisburg, DE· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| RUETGERSWERKE AG | 5 | 1976–1990 |
Locations
| Location | Patents | Span |
|---|---|---|
| Duisburg, DE | 4 | 1981–1990 |
| Duisburg-Meiderich, DT | 1 | 1976 |