Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4945120 | Process for the production of polyurethane foams using sterically hindered aromatic diamines | Richard Kopp, Gunter Oertel, Rolf Wiedermann | 1990-07-31 |
| 4853417 | Process for manufacturing rigid polyurethane foam | Yoshinori Kihara, Masaru Honda | 1989-08-01 |
| 4575520 | Rigid, closed-cell, flame-resistant polyurethane foams | Manfred Kapps, Rolf Wiedermann, Norbert Adam | 1986-03-11 |