Inventor
Siegfried Gruhl
Inventor
Engelskirchen, DE
Overview
Patents· 4 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
B01Dprimary
B01DSeparation30%
B01JChemical or physical processes, e.g. catalysis or colloid chemistry30%
C01BNon-metallic elements10%
C01GCompounds containing metals not covered by subclasses c01d or c01f10%
C01PIndexing scheme relating to structural and physical aspects of solid inorganic compounds10%
C09CTreatment of inorganic materials, other than fibrous fillers, to enhance their pigmenting or filling properties10%
PatentTitleYear
5,173,466'Catalyst for the reduction of nitrogen oxides from waste gases and a process for its production'19924,992,404'Carbon-based catalyst useful in gas-solid reactions'19914,910,005'Process for the reduction of nitrogen oxides from exhaust gases'19903,950,183'Production of annealed pigments'1976Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1976–1992Patents assigned to BAYER AG (4)· patent assignee history
1976Based in Leichlingen, DE· patent location history
1990–1992Based in Engelskirchen, DE· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| BAYER AG | 4 | 1976–1992 |
Locations
| Location | Patents | Span |
|---|---|---|
| Engelskirchen, DE | 3 | 1990–1992 |
| Leichlingen, DE | 1 | 1976 |