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US1289823A
Expired / Lapsed
US
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Electric-discharge-controlling device and method of operating the same.
Assignee: General Electric Co
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Filing: 1914-11-06
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Granted: 1918-12-31
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Expires: 1934-11-06
Abstract
No abstract record available.
Inventors
- 👤 Irving Langmuir
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:33
CPC Classifications
H; H01; H01J; H01J17/00; H01J17/02; H01J17/04; H02; H02M; H02M1/00; H02M1/02; H02M1/04; H03; H03C; H03C1/00
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) | 1921-12-30 | 1922-07-01 | 1922-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1925-12-30 | 1926-07-01 | 1926-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1929-12-30 | 1930-07-01 | 1930-12-31 | $7700.00 | Window Closed / Lapsed |