PQ Corp
PQ CorpActive Patents
0
Total Holdings
5
Patent Holdings
Filter in Explorer →| Patent No. | Title | Status | Filing Date | Grant Date | Claims | Actions |
|---|---|---|---|---|---|---|
| US4540629A | Hollow microspheres with organosilicon-silicate walls | Expired / Lapsed | 1984-02-27 | 1985-09-10 | 24 | Details |
| US4421562A | Manufacturing process for hollow microspheres | Expired / Lapsed | 1983-03-23 | 1983-12-20 | 10 | Details |
| US4420442A | Manufacturing process for hollow microspheres | Expired / Lapsed | 1982-09-21 | 1983-12-13 | 9 | Details |
| US4379143A | Topical liquid or ointment | Expired / Lapsed | 1982-02-01 | 1983-04-05 | 14 | Details |
| US2284248A | Manufacture of shaped particles of hydrous alkali metal sil… | Expired / Lapsed | 1939-02-16 | 1942-05-26 | 0 | Details |