US1294621A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of and means for switching current-flow at high potential.
Assignee: Schweitzer & Conrad
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Filing: 1917-02-26
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Granted: 1919-02-18
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Expires: 1937-02-26
Abstract
No abstract record available.
Inventors
- 👤 Nicholas J Conrad
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:35
CPC Classifications
H; H01; H01H; H01H71/00; H01H71/10; H01H71/12; H01H71/122
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) | 1922-02-17 | 1922-08-19 | 1923-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1926-02-17 | 1926-08-19 | 1927-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1930-02-17 | 1930-08-19 | 1931-02-18 | $7700.00 | Window Closed / Lapsed |