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US1230004A
Expired / Lapsed
US
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Incandescent cathode device.
Assignee: General Electric Co
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Filing: 1915-09-18
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Granted: 1917-06-12
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Expires: 1935-09-18
Abstract
No abstract record available.
Inventors
- 👤 George S Meikle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:50
CPC Classifications
H; H01; H01J; H01J1/00; H01J1/02; H01J1/13; H01J1/20
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) | 1920-06-11 | 1920-12-11 | 1921-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1924-06-11 | 1924-12-11 | 1925-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1928-06-11 | 1928-12-11 | 1929-06-12 | $7700.00 | Window Closed / Lapsed |