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US3520238A
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Apparatus and method for protecting a photographic device
Assignee: National Aeronautics and Space Administration
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Filing: 1967-12-13
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Granted: 1970-07-14
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Expires: 1987-12-13
Abstract
No abstract record available.
Inventors
- 👤 Richard L Bailey
- 👤 William C Tibbitts
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:35
CPC Classifications
G; G03; G03B; G03B17/00; G03B17/02; G03B17/08; G03B15/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB819523A
Cited
US2959090A
Cited
US3321265A
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US3310356A
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US3289557A
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US3370519A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-07-13 | 1974-01-12 | 1974-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-07-13 | 1978-01-12 | 1978-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-07-13 | 1982-01-12 | 1982-07-14 | $7700.00 | Window Closed / Lapsed |