US2945419A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable focal length lens system for movie cameras
Assignee: EDNALITE OPTICAL Co Inc
•
Filing: 1955-12-06
•
Granted: 1960-07-19
•
Expires: 1975-12-06
Abstract
No abstract record available.
Inventors
- 👤 Edwin W Bechtold
- 👤 Kapilow Marvin
- 👤 Alex J Weinstein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:41
CPC Classifications
G; G02; G02B; G02B15/00; G02B15/02; G02B7/00; G02B7/02; G02B7/04; G02B7/10; G03; G03B; G03B19/00; G03B19/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1819844A
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US1988390A
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US2165341A
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US2179850A
Cited
US2193016A
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US2377821A
Cited
US2419706A
Cited
US2454686A
Cited
US2529944A
Cited
US2566485A
Cited
US2718817A
Cited
US2720817A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-07-19 | 1964-01-18 | 1964-07-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-07-19 | 1968-01-18 | 1968-07-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-07-19 | 1972-01-18 | 1972-07-19 | $7700.00 | Window Closed / Lapsed |