US2941078A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Anastigmatic catoptric device
Assignee: Centre National de la Recherche Scientifique
•
Filing: 1955-02-09
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Granted: 1960-06-14
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Expires: 1975-02-09
Abstract
No abstract record available.
Inventors
- 👤 Montel Marc
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:22
CPC Classifications
G; G21; G21K; G21K1/00; G21K1/06; G02; G02B; G02B17/00; G02B17/02; G02B17/06; G02B17/0605; G02B17/0621; G21K7/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1105895A
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US1382261A
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US1815992A
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US2162590A
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US2482698A
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US2500604A
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US2565419A
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US2557662A
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US2540821A
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US2559972A
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US2688094A
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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) | 1963-06-14 | 1963-12-14 | 1964-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-14 | 1967-12-14 | 1968-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-14 | 1971-12-14 | 1972-06-14 | $7700.00 | Window Closed / Lapsed |