Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4944964 | Lacquer, and process for producing anti-corrosion coatings | Helmut Schmidt, Helmut Patzelt, Gerhard Tunker | 1990-07-31 |
| 4840666 | Lacquer, and process for producing anti-corrosion coatings | Helmut Schmidt, Helmut Patzelt, Gerhard Tunker | 1989-06-20 |
| 4505985 | Membranes based on silicic acid heteropolycondensates and a process for their production | Helmut Schmidt, Alfred Kaiser | 1985-03-19 |
| 4374696 | Method of heat-sealing substrates | Helmut Schmidt, Gerhard Tunker | 1983-02-22 |
| 4374933 | Method of preparation of porous membranes and adsorbents | Helmut Schmidt, Harald Bottner | 1983-02-22 |
| 4243692 | Process for the production of silicic acid heteropolycondensates useful as coating materials | Helmut Schmidt | 1981-01-06 |
| 4238590 | Process for the production of silicic acid heteropolycondensates useful as membranes and adsorbents | Helmut Schmidt | 1980-12-09 |