Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4765875 | Preparation of sulfonated lubricating agents for leather and furs | Jurgen Plapper, Friedrich Pieper, Jochen Heidrich | 1988-08-23 |
| 4654042 | Sulfonated lubricating agents for leather and furs process therefore | Jurgen Plapper, Friedrich Pieper, Jochen Heidrich | 1987-03-31 |
| 4451261 | Preparation of lubricating agents for leathers and furs | Manfred Biermann, Horst Baumann, Hans-Herbert Friese, Friedrich Pieper | 1984-05-29 |
| 4270987 | Acid galvanic nickel baths containing N-(2,3-dihydroxypropyl)-pyridinium sulfates | Heinz Wagner | 1981-06-02 |