US1960217A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for the control of gridglow tubes
Assignee: Westinghouse Electric Corp
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Filing: 1932-09-30
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Granted: 1934-05-22
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Expires: 1952-09-30
Abstract
No abstract record available.
Inventors
- 👤 Arthur M Unger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:54
CPC Classifications
H; H02; H02M; H02M1/00; H02M1/02; H02M1/04; H02M1/042
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1937-05-21 | 1937-11-20 | 1938-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1941-05-21 | 1941-11-20 | 1942-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1945-05-21 | 1945-11-20 | 1946-05-22 | $7700.00 | Window Closed / Lapsed |