Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4387077 | Process for the recovery of substantially radium free calcium sulphate, yttrium and lanthanides, as well as calcium sulphate, yttrium and lanthanides obtained by this process | Cornelis A. M. Weterings, Johannes A. Janssen | 1983-06-07 |