US2773741A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of aluminum oxide
Assignee: Godfrey L Cabot Inc
•
Filing: 1952-11-25
•
Granted: 1956-12-11
•
Expires: 1972-11-25
Abstract
No abstract record available.
Inventors
- 👤 Antonsen Randolph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:02
CPC Classifications
C; C01; C01B; C01B13/00; C01B13/14; C01F; C01F7/00; C01F7/02; C01F7/30; C01F7/32
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1132736A
Cited
US1491237A
Cited
US2020505A
Cited
US2043743A
Cited
US2155119A
Cited
US2402471A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-12-11 | 1960-06-11 | 1960-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-12-11 | 1964-06-11 | 1964-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-12-11 | 1968-06-11 | 1968-12-11 | $7700.00 | Window Closed / Lapsed |