US1666701A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lens polisher
Assignee: American Optical Corp
•
Filing: 1922-04-10
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Granted: 1928-04-17
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Expires: 1942-04-10
Abstract
No abstract record available.
Inventors
- 👤 Harry W Hill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:17
CPC Classifications
B; B24; B24B; B24B13/00; B24B13/01; B24D; B24D3/00; B24D3/02; B24D3/20; C; C09; C09K; C09K3/00; C09K3/14; C09K3/1454; C09K3/1481
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1931-04-17 | 1931-10-17 | 1932-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1935-04-17 | 1935-10-17 | 1936-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1939-04-17 | 1939-10-17 | 1940-04-17 | $7700.00 | Window Closed / Lapsed |