Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5286263 | Use of copolymers based on long-chain alkyl vinyl ethers and ethylenically unsaturated dicarboxylic anhydrides for rendering leathers and skins water-repellent | Ortwin Schaffer, Karl Stork, Norbert Greif, Knut Oppenlaender, Walter Denzinger +1 more | 1994-02-15 |
| 5279613 | Copolymers based on long-chain olefins and ethylenically unsaturated dicarboxylic anhydrides for rendering leathers and skins water-repellent | Ortwin Schaffer, Karl Stork, Norbert Greif, Knut Oppenlaender, Walter Denzinger +1 more | 1994-01-18 |
| 5124181 | Copolymers based on long-chain unsaturated esters and ethylenically unsaturated carboxylic acids for making leather and furs water repellent | Ortwin Schaffer, Karl Stork, Norbert Greif, Knut Oppenlaender, Walter Denzinger +1 more | 1992-06-23 |
| 4931062 | Hydrophobization of leather, pelts and leather substitute materials with carboxyl-containing polysiloxanes | Guenter Eckert, Wolfram Bergold | 1990-06-05 |
| 4701269 | Waterproofing leather and skins | Rudi Widder, Guenter Eckert | 1987-10-20 |