US1874753A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Controlled arc discharge apparatus
Assignee: General Electric Co
•
Filing: 1929-03-23
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Granted: 1932-08-30
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Expires: 1949-03-23
Abstract
No abstract record available.
Inventors
- 👤 Albert W Hull
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:34
CPC Classifications
H; H02; H02M; H02M7/00; H02M7/02; H02M7/04; H02M7/12; H02M7/145; H02M7/15; H01; H01J; H01J17/00; H01J17/02; H01J17/04; H01J17/06; H01J17/50; H01J17/52; H01J17/54; H01J17/56; H01J61/00; H01J61/02; H01J61/30
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) | 1935-08-30 | 1936-02-29 | 1936-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1939-08-30 | 1940-02-29 | 1940-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1943-08-30 | 1944-02-29 | 1944-08-30 | $7700.00 | Window Closed / Lapsed |