US2916962A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical systems for stereoscopic cameras
Assignee: National Research Development Corp UK
•
Filing: 1954-05-24
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Granted: 1959-12-15
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Expires: 1974-05-24
Abstract
No abstract record available.
Inventors
- 👤 Spottiswoode Nigel Lawrence
- 👤 Spottiswoode Raymond John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:34
CPC Classifications
G; G03; G03B; G03B35/00; G03B35/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1461133A
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US852476A
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US1488027A
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US1818354A
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FR613749A
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US2056600A
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US2053224A
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US2153892A
Cited
GB473766A
Cited
US2630737A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-12-14 | 1963-06-15 | 1963-12-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-12-14 | 1967-06-15 | 1967-12-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-12-14 | 1971-06-15 | 1971-12-15 | $7700.00 | Window Closed / Lapsed |