US975420A
Expired / Lapsed
US
⏱️ 0.0 years remaining
System of electric-circuit protection.
Assignee: Westinghouse Electric Corp
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Filing: 1909-01-21
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Granted: 1910-11-15
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Expires: 1929-01-21
Abstract
No abstract record available.
Inventors
- 👤 Ford W Harris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 02:35
CPC Classifications
H; H01; H01H; H01H71/00; H01H71/10; H01H71/66; H01H71/68
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) | 1913-11-14 | 1914-05-16 | 1914-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1917-11-14 | 1918-05-16 | 1918-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1921-11-14 | 1922-05-16 | 1922-11-15 | $7700.00 | Window Closed / Lapsed |