Patent US1340879A successfully refreshed from Google Patents.
US1340879A
Expired / Lapsed
US
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Temple
Assignee: American Optical Corp
•
Filing: 1917-12-26
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Granted: 1920-05-25
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Expires: 1937-12-26
Abstract
No abstract record available.
Inventors
- 👤 George H Day
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:27
CPC Classifications
G; G02; G02C; G02C5/00; G02C5/22; G02C5/2263; G02C5/02; G02C5/04; G02C5/045; G02C5/14; G02C5/20; G02C2200/00; G02C2200/08; G02C2200/18
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) | 1923-05-25 | 1923-11-24 | 1924-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1927-05-25 | 1927-11-24 | 1928-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1931-05-25 | 1931-11-24 | 1932-05-25 | $7700.00 | Window Closed / Lapsed |