Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4329499 | Alkyldiphenyl ether-sulphonic acid hydrazides, their preparation and their use as blowing agents | Walter Horstmann | 1982-05-11 |
| 4325789 | Process for separating off phenol from a mixture thereof with a cresol | Alfredo Wust | 1982-04-20 |
| 4319019 | Polyamines containing amide groups | Wolfgang Lehmann, Friedhelm Muller, Gunther Cramn, Wilfried Lobach | 1982-03-09 |
| 4250298 | Polyamines containing amide groups | Wolfgang Lehmann, Friedhelm Muller, Wilfried Lobach, Gunther Cramm | 1981-02-10 |
| 4250299 | Polyamines containing amide groups | Wolfgang Lehmann, Friedhelm Muller, Gunther Cramm, Wilfried Lobach | 1981-02-10 |