US2649667A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Abrading device
Assignee: American Optical Corp
•
Filing: 1952-08-25
•
Granted: 1953-08-25
•
Expires: 1972-08-25
Abstract
No abstract record available.
Inventors
- 👤 Cooke Frank
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:52
CPC Classifications
B; B24; B24B; B24B13/00; B24B13/04; B24B13/043; B24B13/01; B24D; B24D7/00; B24D7/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE199312C
Cited
US108822A
Cited
US1828663A
Cited
DE562128C
Cited
CH247293A
Cited
DE804762C
Cited
US2600815A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-08-24 | 1957-02-23 | 1957-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-24 | 1961-02-23 | 1961-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-24 | 1965-02-23 | 1965-08-25 | $7700.00 | Window Closed / Lapsed |