US2847907A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable focal-length objectives
Assignee: Individual
•
Filing: 1956-01-10
•
Granted: 1958-08-19
•
Expires: 1976-01-10
Abstract
No abstract record available.
Inventors
- 👤 Angenieux Pierre
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:18
CPC Classifications
G; G02; G02B; G02B15/00; G02B15/14; G02B15/143; G02B15/1431; G02B15/143105
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2165341A
Cited
US2179850A
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US2353565A
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US2514239A
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US2566485A
Cited
US2663223A
Cited
US2649025A
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FR1081948A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-08-18 | 1962-02-17 | 1962-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-08-18 | 1966-02-17 | 1966-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-08-18 | 1970-02-17 | 1970-08-19 | $7700.00 | Window Closed / Lapsed |