US2491010A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric switch having electromagnetic arc extinguishing means
Assignee: Ohio Brass Co
•
Filing: 1945-07-27
•
Granted: 1949-12-13
•
Expires: 1965-07-27
Abstract
No abstract record available.
Inventors
- 👤 Warren J Lewis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 07:29
CPC Classifications
H; H01; H01H; H01H9/00; H01H9/30; H01H9/44
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US533083A
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US1469381A
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US769116A
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US1300498A
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US1439692A
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US1834306A
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US1894543A
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US2281752A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-12-12 | 1953-06-13 | 1953-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-12-12 | 1957-06-13 | 1957-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-12-12 | 1961-06-13 | 1961-12-13 | $7700.00 | Window Closed / Lapsed |