Inventor
Robert Zellerhoff
Inventor
Hamminkeln, DE
Overview
Patents· 6 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
C07Cprimary
C07CAcyclic or carbocyclic compounds25%
B01JChemical or physical processes, e.g. catalysis or colloid chemistry8%
B09BDisposal of solid waste not otherwise provided for8%
C08FMacromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds8%
C08JWorking-up8%
C08KUse of inorganic or non-macromolecular organic substances as compounding ingredients8%
C09DCoating compositions, e.g. paints, varnishes or lacquers8%
C10BDestructive distillation of carbonaceous materials for production of gas, coke, tar, or similar materials8%
C10CWorking-up pitch, asphalt, bitumen, tar8%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests8%
PatentTitleYear
6,166,126'Binder solutions for printing inks containing aromatic polymers with high softening points'20006,107,527'Process for the production of hydroxy-aromatic substances'20005,990,357'Process for the oxidation of isoalkylaromatic hydrocarbons, and catalyst for the execution of the process'19995,075,416'Novel process'19914,900,717'Recovery of 2,6-dialkyl-naphthalene isomers'19904,429,172'Process for the production of modified pitches and low boiling aromatics and olefins and use of said pitches'1984Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1984–1991Patents assigned to RUETGERSWERKE AG (3)· patent assignee history
1984Based in Dinslaken, DE· patent location history
1990–2000Based in Hamminkeln, DE· patent location history
1999–2000Patents assigned to RUTGERS KUREHA SOLVENTS GMBH (2)· patent assignee history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| RUETGERSWERKE AG | 3 | 1984–1991 |
| RUTGERS KUREHA SOLVENTS GMBH | 2 | 1999–2000 |
Locations
| Location | Patents | Span |
|---|---|---|
| Hamminkeln, DE | 5 | 1990–2000 |
| Dinslaken, DE | 1 | 1984 |