Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5073622 | Process for the preparation of novolak resins with low metal ion content | Bernhard Wojtech, Walter Niederstaetter | 1991-12-17 |
| 4873169 | Process for the preparation of an o-naphthoquinonediazide sulfonic acid ester and photosensitive mixture containing same | Fritz Erdmann, Hans J. Staudt | 1989-10-10 |
| 4693884 | Technetium-99m triphosphonates and tetraphosphonates for the scintigraphic visualization of res-containing organs and lymph vessels, and a process for their preparation | Hans-Jerg Kleiner, Gerhard Kloss, Michael Molter, Alexander Schwarz | 1987-09-15 |
| 4474711 | Process for the preparation of monoalkyl phosphonites | Hans-Jerg Kleiner | 1984-10-02 |
| 4332746 | Diphosphonodicarboxylic acid esters | Volker Knittel, Werner Sommer, Gerhard Weckler | 1982-06-01 |
| 4260422 | Novel phosphonocarboxylic acid compounds | Volker Knittel, Werner Sommer, Gerhard Weckler | 1981-04-07 |