US2774008A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Time delay space charge device
Assignee: CAPEHART FARNSWORTH Co
•
Filing: 1953-08-26
•
Granted: 1956-12-11
•
Expires: 1973-08-26
Abstract
No abstract record available.
Inventors
- 👤 Howard B Rooks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:24
CPC Classifications
H; H01; H01J; H01J25/00; H01J25/78
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1870888A
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US2009457A
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US2036350A
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US2107410A
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US2265311A
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US2642535A
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US2511728A
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US2566037A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-12-11 | 1960-06-11 | 1960-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-12-11 | 1964-06-11 | 1964-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-12-11 | 1968-06-11 | 1968-12-11 | $7700.00 | Window Closed / Lapsed |