US2878331A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Switch group operating mechanism
Assignee: McGraw Edison Co
•
Filing: 1954-02-11
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Granted: 1959-03-17
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Expires: 1974-02-11
Abstract
No abstract record available.
Inventors
- 👤 Thorsten A Fjellstedt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 01:37
CPC Classifications
H; H01; H01H; H01H31/00; H01H31/14; H01H31/16; H01H31/18; H01H31/20; H01H3/00; H01H3/32; H01H3/46; H01H2003/323; Y; Y10; Y10T; Y10T74/00; Y10T74/20; Y10T74/20012
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB556463A
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US1305302A
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US1842707A
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US1923805A
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US2207683A
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US2404311A
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US2408200A
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US2445833A
Cited
US2669622A
Cited
US2582326A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-03-16 | 1962-09-15 | 1963-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-16 | 1966-09-15 | 1967-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-16 | 1970-09-15 | 1971-03-17 | $7700.00 | Window Closed / Lapsed |