Inventor
Berndt-Ullrich Kohler
Inventor
Krefeld, DE
Overview
Patents· 5 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
C01Gprimary
C01GCompounds containing metals not covered by subclasses c01d or c01f23%
C01PIndexing scheme relating to structural and physical aspects of solid inorganic compounds18%
C09CTreatment of inorganic materials, other than fibrous fillers, to enhance their pigmenting or filling properties18%
C04BLime, magnesia9%
B82YSpecific uses or applications of nanostructures5%
C01BNon-metallic elements5%
G11BInformation storage based on relative movement between record carrier and transducer5%
H01FMagnets5%
Y02PClimate change mitigation technologies in the production or processing of goods5%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests5%
PatentTitleYear
7,537,749'Method for processing iron-laden spent sulfuric acid'20096,080,233'Cobalt-containing iron oxide pigments, process for producing the same and magnetic recording medium containing the same'20005,837,051'Process for the thermal treatment of iron oxides in a circulating fluidized bed'19985,718,755'Preparation and use of iron oxide black pigment granules'19985,338,355'Method of preparing goethite'1994Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1994–1998Patents assigned to BAYER AG (3)· patent assignee history
1994–2009Based in Krefeld, DE· patent location history
1998Based in Lauro de Freitas, BR· patent location history
2000Patents assigned to TODA KOGYO CORP (1)· patent assignee history
2009Patents assigned to TRONOX PIGMENTS GMBH (1)· patent assignee history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| BAYER AG | 3 | 1994–1998 |
| TODA KOGYO CORP | 1 | 2000 |
| TRONOX PIGMENTS GMBH | 1 | 2009 |
Locations
| Location | Patents | Span |
|---|---|---|
| Krefeld, DE | 4 | 1994–2009 |
| Lauro de Freitas, BR | 1 | 1998 |