Patent US2934670A successfully refreshed from Google Patents.
US2934670A
Expired / Lapsed
US
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Electron tubes and method of making same
Assignee: CBS Broadcasting Inc
•
Filing: 1956-11-05
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Granted: 1960-04-26
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Expires: 1976-11-05
Abstract
No abstract record available.
Inventors
- 👤 Gingrande Arthur
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:55
CPC Classifications
H; H01; H01J; H01J1/00; H01J1/02; H01J1/13; H01J1/20; H01J1/22; H01J1/15
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1986473A
Cited
US1953456A
Cited
US2084913A
Cited
US2620287A
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US2686885A
Cited
US2784123A
Cited
US2783530A
Cited
US2785093A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-04-26 | 1963-10-26 | 1964-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-04-26 | 1967-10-26 | 1968-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-04-26 | 1971-10-26 | 1972-04-26 | $7700.00 | Window Closed / Lapsed |