US2766658A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable focal length focusing lens system and device therefor
Assignee: Individual
•
Filing: 1955-05-20
•
Granted: 1956-10-16
•
Expires: 1975-05-20
Abstract
No abstract record available.
Inventors
- 👤 Schwesinger Gerhard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 03:52
CPC Classifications
G; G02; G02B; G02B15/00; G02B15/14; G02B15/144; G02B15/1441; G02B15/144109
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE597354C
Cited
US2566889A
Cited
US2514239A
Cited
US2566485A
Cited
US2663223A
Cited
US2649025A
Cited
FR1080099A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-10-16 | 1960-04-16 | 1960-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-10-16 | 1964-04-16 | 1964-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-10-16 | 1968-04-16 | 1968-10-16 | $7700.00 | Window Closed / Lapsed |