Patent US2889874A successfully refreshed from Google Patents.
US2889874A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermal treatment of finely divided substances
Assignee: FPInnovations
•
Filing: 1954-12-23
•
Granted: 1959-06-09
•
Expires: 1974-12-23
Abstract
No abstract record available.
Inventors
- 👤 William H Gauvin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:01
CPC Classifications
B; B01; B01J; B01J8/00; B01J8/08; B01J8/12; B01D; B01D1/00; B01D1/16; B01D1/18; B01F; B01F35/00; B01F35/90; B01J8/18; B01J8/1836; B01J2208/00; B01J2208/00008; B01J2208/00017; B01J2208/00026; B01J2208/00035; B01J2208/0007; B01J2208/00106; B01J2208/00168; B01J2208/00212; B01J2208/00327; B01J2208/00336
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1634640A
Cited
US888016A
Cited
US889017A
Cited
US1163339A
Cited
US1213596A
Cited
US1215889A
Cited
US1782054A
Cited
US1713237A
Cited
US2155119A
Cited
US2397899A
Cited
US2283832A
Cited
US2413420A
Cited
US2460546A
Cited
FR977742A
Cited
US2473539A
Cited
US2465410A
Cited
US2636555A
Cited
US2576264A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-06-08 | 1962-12-08 | 1963-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-06-08 | 1966-12-08 | 1967-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-06-08 | 1970-12-08 | 1971-06-09 | $7700.00 | Window Closed / Lapsed |