US2913956A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic and cinematographic objective of large focal length
Assignee: ISK Optics GmbH
•
Filing: 1958-02-21
•
Granted: 1959-11-24
•
Expires: 1978-02-21
Abstract
No abstract record available.
Inventors
- 👤 Solisch Rudolf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 05:38
CPC Classifications
G; G02; G02B; G02B9/00; G02B9/34
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1584272A
Cited
GB350323A
Cited
US1998704A
Cited
US2105799A
Cited
US2141733A
Cited
US2481688A
Cited
US2543856A
Cited
US2622479A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-11-23 | 1963-05-25 | 1963-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-23 | 1967-05-25 | 1967-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-23 | 1971-05-25 | 1971-11-24 | $7700.00 | Window Closed / Lapsed |