US2873646A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mechanism for variable focal length objective
Assignee: Individual
•
Filing: 1955-09-01
•
Granted: 1959-02-17
•
Expires: 1975-09-01
Abstract
No abstract record available.
Inventors
- 👤 Angenieux Pierre
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 00:29
CPC Classifications
G; G02; G02B; G02B15/00; G02B15/14; G02B15/144; G02B15/1441; G02B15/144105
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1988390A
Cited
US1950166A
Cited
GB536706A
Cited
US2377821A
Cited
US2514239A
Cited
US2566485A
Cited
FR1014069A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-02-16 | 1962-08-18 | 1963-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-02-16 | 1966-08-18 | 1967-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-02-16 | 1970-08-18 | 1971-02-17 | $7700.00 | Window Closed / Lapsed |