US2529110A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ophthalmic device having detachable shield
Assignee: American Optical Corp
•
Filing: 1945-10-01
•
Granted: 1950-11-07
•
Expires: 1965-10-01
Abstract
No abstract record available.
Inventors
- 👤 Edward M Splaine
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:10
CPC Classifications
A; A21; A21D; A21D6/00; A21D6/003; G; G02; G02C; G02C7/00; G02C7/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1238396A
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US1394109A
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US1596019A
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US2155693A
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US2187810A
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US2191937A
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US2337617A
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US2257812A
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US2387851A
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US2397243A
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US2368750A
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US2360482A
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US2387849A
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US2444498A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-11-06 | 1954-05-08 | 1954-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-11-06 | 1958-05-08 | 1958-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-11-06 | 1962-05-08 | 1962-11-07 | $7700.00 | Window Closed / Lapsed |