US2566485A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Auxiliary optical device with variable magnifying power
Assignee: D'optique & De Mecanique De Haute Precision Ste
•
Filing: 1950-01-16
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Granted: 1951-09-04
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Expires: 1970-01-16
Abstract
No abstract record available.
Inventors
- 👤 Cuvillier Roger Henri Raymond
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:05
CPC Classifications
G; G02; G02B; G02B15/00; G02B15/14; G02B15/142; G02B15/1421
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US756779A
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US1094724A
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US2107305A
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DE622046C
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US2235364A
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US2165341A
Cited
US2184018A
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US2324057A
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US2501219A
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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) | 1954-09-03 | 1955-03-05 | 1955-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-09-03 | 1959-03-05 | 1959-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-09-03 | 1963-03-05 | 1963-09-04 | $7700.00 | Window Closed / Lapsed |