WALTHER H DUISBERG
WALTHER HActive Patents
0
Total Holdings
5
Patent Holdings
Filter in Explorer →| Patent No. | Title | Status | Filing Date | Grant Date | Claims | Actions |
|---|---|---|---|---|---|---|
| US2297613A | Process of producing viscose rayon | Expired / Lapsed | 1939-11-01 | 1942-09-29 | 0 | Details |
| US2261313A | Process for uniting materials of polymerized vinylchloride … | Expired / Lapsed | 1939-04-13 | 1941-11-04 | 0 | Details |
| US2231497A | Apparatus for producing a continuous sliver composed of ray… | Expired / Lapsed | 1938-09-21 | 1941-02-11 | 0 | Details |
| US2215112A | Apparatus for producing a uniform sliver of continuous rayo… | Expired / Lapsed | 1939-11-25 | 1940-09-17 | 0 | Details |
| US2214211A | Process for producing zirconium metal | Expired / Lapsed | 1940-01-18 | 1940-09-10 | 0 | Details |