Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4678519 | Method of zinc phosphatization, activation and refining bath used in said method and corresponding concentrate | Joseph Schapira, Denis Thery, Stephane Jelodin | 1987-07-07 |
| 4670066 | Process for the treatment by chemical conversion of substrates of zinc or of one of its alloys, concentrate and bath used for performing this process | Joseph Schapira, Francois-Joseph Duboys, Patrick Regnard | 1987-06-02 |
| 4668307 | Bath and process for the chemical conversion of metal substrates with zinc | Joseph Schapira, Christian Hoessler, Louis Cot, Jean-Henri Durand, Patrice Pelletier | 1987-05-26 |
| 4497666 | Process for the treatment of phosphatized metal surfaces with a composition comprising trivalent titanium | Joseph Schapira, Jean-Loup Dauptain | 1985-02-05 |
| 4311536 | Processes of phosphating surfaces of iron and of steel with manganese | Joseph Schapira, Jean-Claude Masson, Francois-Joseph Duboys | 1982-01-19 |