Patent US2516724A successfully refreshed from Google Patents.
US2516724A
Expired / Lapsed
US
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Wide angle orthoscopic anastigmatic photographic objective
Assignee: Individual
•
Filing: 1946-08-23
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Granted: 1950-07-25
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Expires: 1966-08-23
Abstract
No abstract record available.
Inventors
- 👤 Rossinov Michael Michaelovitch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 04:04
CPC Classifications
G; G02; G02B; G02B13/00; G02B13/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB190121211A
Cited
GB225398A
Cited
GB329350A
Cited
DE620538C
Cited
US2031792A
Cited
US2140024A
Cited
US2146662A
Cited
GB677592A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-07-24 | 1954-01-23 | 1954-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-07-24 | 1958-01-23 | 1958-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-07-24 | 1962-01-23 | 1962-07-25 | $7700.00 | Window Closed / Lapsed |