US2916966A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catadioptric objectives
Assignee: Centre National de la Recherche Scientifique
•
Filing: 1956-05-31
•
Granted: 1959-12-15
•
Expires: 1976-05-31
Abstract
No abstract record available.
Inventors
- 👤 Nomarski Georges
- 👤 Rousseau Pierre
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 03:12
CPC Classifications
G; G02; G02B; G02B17/00; G02B17/008; G02B21/00; G02B21/02; G02B21/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2336379A
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US2380887A
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US2380888A
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US2571657A
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US2520633A
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US2520635A
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US2683393A
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GB680221A
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US2656761A
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US2684015A
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US2576011A
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US2707417A
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FR1089520A
Cited
FR1101615A
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US2785604A
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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) | 1962-12-14 | 1963-06-15 | 1963-12-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-12-14 | 1967-06-15 | 1967-12-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-12-14 | 1971-06-15 | 1971-12-15 | $7700.00 | Window Closed / Lapsed |