US1159914A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Starting-electrode for vapor electric apparatus.
Assignee: Westinghouse Electric Corp
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Filing: 1914-02-05
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Granted: 1915-11-09
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Expires: 1934-02-05
Abstract
No abstract record available.
Inventors
- 👤 Sidney W Farnsworth
- 👤 David E Carpenter
- 👤 Leslie E Frost
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 04:04
CPC Classifications
H; H05; H05B; H05B31/00; H05B31/02; H05B31/18; H01; H01J; H01J61/00; H01J61/98
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) | 1918-11-08 | 1919-05-10 | 1919-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1922-11-08 | 1923-05-10 | 1923-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1926-11-08 | 1927-05-10 | 1927-11-09 | $7700.00 | Window Closed / Lapsed |