Inventor
Klaus Bergrath
Inventor
Oberhausen, 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 compounds42%
C07FAcyclic, carbocyclic or heterocyclic compounds containing elements other than carbon, hydrogen, halogen, oxygen, nitrogen, sulfur, selenium or tellurium33%
B01JChemical or physical processes, e.g. catalysis or colloid chemistry25%
PatentTitleYear
7,102,034'Process for preparing sulfonated arylphosphines'20066,864,387'Process for preparing sulfonated arylphosphines'20056,740,773'Process for preparing cyclohexanedicarboxylic esters'20046,610,881'Method for producing sulfonated aryl phosphines'20036,137,013'Method of stabilizing aldehydes'20005,451,698'Process for the preparation of sulfonated arylphosphines'1995Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1995Patents assigned to HOECHST AG (1)· patent assignee history
1995–2006Based in Oberhausen, DE· patent location history
2000Patents assigned to CELANESE GMBH (1)· patent assignee history
2003Patents assigned to CELANESE CHEMICALS EUROP (1)· patent assignee history
2004–2006Patents assigned to CELANESE CHEM EUROPE GMBH (3)· patent assignee history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| CELANESE CHEM EUROPE GMBH | 3 | 2004–2006 |
| CELANESE CHEMICALS EUROP | 1 | 2003 |
| CELANESE GMBH | 1 | 2000 |
| HOECHST AG | 1 | 1995 |
Locations
| Location | Patents | Span |
|---|---|---|
| Oberhausen, DE | 6 | 1995–2006 |