Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5389402 | Method of producing decorations which are color-stable in a porcelain firing and a pigment composition suitable therefor | Dietrich Speer, Akos Kiss, Guenter Halbritter, Rita Loew | 1995-02-14 |
| 5330571 | Inclusion pigments of zirconium silicate with included chromic oxide, a process for the preparation and use thereof | Dietrich Speer, Akos Kiss, Peter Kleinschmit, Christel Zell | 1994-07-19 |
| 5254162 | Brown spinel pigments based on zinc chromite, method of their production and use | Dietrich Speer, Akos Kiss | 1993-10-19 |
| 5252126 | Neutral blue zirconium-vanadium pigments | Dietrich Speer, Akos Kiss | 1993-10-12 |
| 5205866 | Method for making grey-black inclusion pigments | Akos Kiss, Dietrich Speer, Peter Kleinschmit | 1993-04-27 |
| 5194089 | Coated spinel color pigments, process for their production and use | Dietrich Speer, Akos Kiss, Peter Kleinschmit | 1993-03-16 |
| 4874433 | Methods of preparing encapsulated pigments | Akos Kiss, Peter Kleinschmit, Juergen Hanich, Guenter Halbritter | 1989-10-17 |