US1721170A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ophthalmic mounting
Assignee: American Optical Corp
•
Filing: 1925-04-23
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Granted: 1929-07-16
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Expires: 1945-04-23
Abstract
No abstract record available.
Inventors
- 👤 William J Wrighton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:32
CPC Classifications
G; G02; G02C; G02C1/00; G02C1/06; Y; Y10; Y10S; Y10S264/00; Y10S264/71
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) | 1932-07-15 | 1933-01-14 | 1933-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1936-07-15 | 1937-01-14 | 1937-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1940-07-15 | 1941-01-14 | 1941-07-16 | $7700.00 | Window Closed / Lapsed |