Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5009878 | Zirconium dioxide powder, processes for its preparation and its use for the production of sintered articles | — | 1991-04-23 |
| 4867763 | Process and equipment for the fractional desublimation of solids in vapor form from gas/vapor mixtures | — | 1989-09-19 |
| 4773923 | Process and apparatus for fractional desublimation of vapor-phase solids from gas-vapor mixtures | — | 1988-09-27 |
| 4681046 | Method of utilizing distillation residues of phthalic acid anhydride or maleic acid anhydride | Wilfried Krix | 1987-07-21 |
| 4598157 | Method for the manufacture of pyromellitic acid dianhydride | — | 1986-07-01 |
| 4250119 | Process for the production of acetone from isobutyraldehyde | Gerhard Franz | 1981-02-10 |
| 4200589 | Process for preparing acetone from isobutyraldehyde | — | 1980-04-29 |