Inventor
Gerhard Wiechers
Inventor
Leverkusen, DE
Overview
Patents· 10 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
C07Cprimary
C07CAcyclic or carbocyclic compounds83%
B01JChemical or physical processes, e.g. catalysis or colloid chemistry8%
Y02PClimate change mitigation technologies in the production or processing of goods8%
PatentTitleYear
7,511,176'Process for the preparation of toluenediamines by catalytic hydrogenation of dinitrotoluenes'20097,495,136'Process for the production of dinitrotoluene'20096,258,986'Process for the production of dinitrotoluene'20015,696,305'Process for the production of nitroaromatic compounds'19975,689,018'Process for the production of dinitrotoluene'19975,679,873'Process for the production of dinitrotoluene'19975,663,462'Process for the production of dinitrotoluene and isomeric mixtures of dinitrotoluene'19975,616,818'Process for the polynitration of aromatic compounds'19975,395,995'Process for the preparation and purification of nitroaromatics'19955,345,012'Process for the preparation of dinitrotoluene'1994Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1994–2001Patents assigned to BAYER AG (8)· patent assignee history
1994–2009Based in Leverkusen, DE· patent location history
2009Patents assigned to BAYER MATERIALSCIENCE AG (2)· patent assignee history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| BAYER AG | 8 | 1994–2001 |
| BAYER MATERIALSCIENCE AG | 2 | 2009 |
Locations
| Location | Patents | Span |
|---|---|---|
| Leverkusen, DE | 10 | 1994–2009 |