Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4912249 | Esters of 3-tert-butyl or 3-tert-butyl-5-alkyl-4-hydroxylphenyl(alkane) carboxylic acids | Friedrich-Wilhelm Kupper, Heinz-Werner Voges, Werner Patzold | 1990-03-27 |
| 4859790 | Esters of 3-tert-butyl- and 3-tert-butyl-5-alkyl-4-hydroxyphenyl (alkane) carboxylic acids with oxethylates of polyhydroxyaromatics, process for their production, and their use as stabilizers | Friedrich-Wilhelm Kupper, Heinz-Werner Voges, Werner Patzold | 1989-08-22 |