Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4857070 | 2,4-Diaminophenyl tetrahydrofurfuryl ethers, processes for their preparation and tinting compositions, which contain them for keratinic fibres | Winfried Seidel | 1989-08-15 |
| 4802889 | 2-cyano-4,6-dinitrophenyl mono-azo dyes for polyester and cellulose acetate | Ulrich Bte,uml/u/ hler, Reinhard Kuhn, Albert Bode, Margareta Boss | 1989-02-07 |