Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4547578 | Process for removing naphthoquinone from phthalic anhydride produced through air oxidation of naphthalene | Fritz Gude | 1985-10-15 |
| 4496710 | Process for the production of flat varnishes | Fritz Gude, Heinz Riemer, Gunter Dormann | 1985-01-29 |
| 4316977 | Copolymer of maleic anhydride, dicyclopentadiene and vinylcyclohexene and its use as anionic paper surface sizing material | Fritz Gude, Felix Schulde | 1982-02-23 |
| 4252545 | Process for the fractional desublimation of pyromellitic acid dianhydride | — | 1981-02-24 |