US2736993A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Abrading apparatus
Assignee: American Optical Corp
•
Filing: 1953-03-25
•
Granted: 1956-03-06
•
Expires: 1973-03-25
Abstract
No abstract record available.
Inventors
- 👤 Walter C Tripp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:11
CPC Classifications
B; B24; B24B; B24B13/00; B24B13/005; B24B13/02; B24B13/023
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US718474A
Cited
US1408594A
Cited
US1455438A
Cited
US1725103A
Cited
US1972415A
Cited
US2395700A
Cited
US2441108A
Cited
GB644750A
Cited
US2680994A
Cited
US2688220A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-03-06 | 1959-09-05 | 1960-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-03-06 | 1963-09-05 | 1964-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-03-06 | 1967-09-05 | 1968-03-06 | $7700.00 | Window Closed / Lapsed |