US2535115A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lens for motion-picture cameras
Assignee: Individual
•
Filing: 1948-10-14
•
Granted: 1950-12-26
•
Expires: 1968-10-14
Abstract
No abstract record available.
Inventors
- 👤 Frank G Back
- 👤 Lowen Herbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 07:36
CPC Classifications
G; G02; G02B; G02B7/00; G02B7/02; G02B7/04; G02B7/10; G02B7/105
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US943105A
Cited
US1688441A
Cited
US1922537A
Cited
US1883673A
Cited
US1988390A
Cited
US2042815A
Cited
US2321973A
Cited
US2382669A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-12-25 | 1954-06-26 | 1954-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-12-25 | 1958-06-26 | 1958-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-12-25 | 1962-06-26 | 1962-12-26 | $7700.00 | Window Closed / Lapsed |