Patent US2931858A successfully refreshed from Google Patents.
US2931858A
Expired / Lapsed
US
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Television reconnaissance system
Assignee: Individual
•
Filing: 1955-10-03
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Granted: 1960-04-05
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Expires: 1975-10-03
Abstract
No abstract record available.
Inventors
- 👤 Jr John Hays Hammond
- 👤 Chaffee Emory Leon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:30
CPC Classifications
H; H04; H04N; H04N7/00; H04N7/002; H04N7/005; G; G03; G03B; G03B15/00; G03B17/00; G03B17/48; G03B17/50
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2219120A
Cited
GB477355A
Cited
US2275898A
Cited
US2333768A
Cited
US2373114A
Cited
US2485594A
Cited
US2714131A
Cited
US2709716A
Cited
US2798116A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-04-05 | 1963-10-05 | 1964-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-04-05 | 1967-10-05 | 1968-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-04-05 | 1971-10-05 | 1972-04-05 | $7700.00 | Window Closed / Lapsed |