US2678585A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ophthalmic mounting
Assignee: American Optical Corp
•
Filing: 1949-12-30
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Granted: 1954-05-18
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Expires: 1969-12-30
Abstract
No abstract record available.
Inventors
- 👤 Charles A Ellis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:53
CPC Classifications
G; G02; G02C; G02C1/00; G02C1/02; G02C1/04; Y; Y10; Y10S; Y10S411/00; Y10S411/904; Y10S411/907; Y10S411/908; Y10S411/915; Y10S411/955; Y10S411/956; Y10S411/96
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB190101315A
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US843531A
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US958485A
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US1115700A
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US1674258A
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FR736546A
Cited
GB391668A
Cited
US2058025A
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US2086086A
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US2105420A
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US2275315A
Cited
US2362726A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-05-17 | 1957-11-16 | 1958-05-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-05-17 | 1961-11-16 | 1962-05-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-05-17 | 1965-11-16 | 1966-05-18 | $7700.00 | Window Closed / Lapsed |