Patent US2800547A successfully refreshed from Google Patents.
US2800547A
Expired / Lapsed
US
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Front operated disconnect switch mechanism
Assignee: Arrow Hart and Hegeman Electric Co
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Filing: 1954-10-06
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Granted: 1957-07-23
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Expires: 1974-10-06
Abstract
No abstract record available.
Inventors
- 👤 David W Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:41
CPC Classifications
H; H01; H01H; H01H21/00; H01H21/02; H01H21/18; H01H21/36; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18888; Y10T74/18896
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2163919A
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US2251830A
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US2281544A
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US2318227A
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US2289643A
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US2515449A
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US2490523A
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US2481141A
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US2605367A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-07-22 | 1961-01-21 | 1961-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-07-22 | 1965-01-21 | 1965-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-07-22 | 1969-01-21 | 1969-07-23 | $7700.00 | Window Closed / Lapsed |