Patent US2971160A successfully refreshed from Google Patents.
US2971160A
Expired / Lapsed
US
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Anode current regulation
Assignee: GTE Sylvania Inc
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Filing: 1958-11-25
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Granted: 1961-02-07
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Expires: 1978-11-25
Abstract
No abstract record available.
Inventors
- 👤 Paul J Erdle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:06
CPC Classifications
H; H01; H01J; H01J1/00; H01J1/02; H01J1/13; H01J1/135; H01J19/00; H01J19/78
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1675334A
Cited
US1998199A
Cited
US2144509A
Cited
US2247198A
Cited
US2668930A
Cited
US2813227A
Cited
US2875377A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-02-07 | 1964-08-08 | 1965-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-02-07 | 1968-08-08 | 1969-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-02-07 | 1972-08-08 | 1973-02-07 | $7700.00 | Window Closed / Lapsed |