Issued Patents All Time
Showing 26–32 of 32 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4448946 | Process for the preparation of noncellular polyurethane elastomers based on 4,4-diisocyanato-1,2-diphenylethane | Karl H. Illers, Herbert Haberkorn, Walter Heckmann | 1984-05-15 |
| 4436869 | Production of closed-cell polyurethane moldings having a densified surface zone | Otmar Zipp, Heinz Bollmann, Wolfgang Scholz | 1984-03-13 |
| 4421870 | Process for the preparation of cellular polyurethane elastomers based on 4,4'-diisocyanato-1,2-diphenylethane | Karl H. Illers, Herbert Haberkorn, Walter Heckmann | 1983-12-20 |
| 4251639 | Manufacture of flexible foams | Wolfgang Jarre, Ernst Schoen | 1981-02-17 |
| 4208507 | Polyurethane-urea elastomers and their production | Karl H. Illers, Ludwig Schuster | 1980-06-17 |
| 4195149 | Hard, rigid, non-elastomeric polyurethane, compositions | Robert Gehm | 1980-03-25 |
| 4191818 | Process for preparing heat-resistant polyurethane elastomers having no secondary softening range | Karl H. Illers | 1980-03-04 |