Patent US2556054A successfully refreshed from Google Patents.
US2556054A
Expired / Lapsed
US
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Spring-driven operating mechanism for electric switchgears
Assignee: A Reyrolle and Co Ltd
•
Filing: 1945-07-30
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Granted: 1951-06-05
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Expires: 1965-07-30
Abstract
No abstract record available.
Inventors
- 👤 Allan Archibald
- 👤 Small Joseph Freder Strickland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 07:43
CPC Classifications
H; H01; H01H; H01H3/00; H01H3/22; H01H3/30; Y; Y10; Y10T; Y10T74/00; Y10T74/11; Y10T74/18; Y10T74/18888; Y10T74/18896
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1900584A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-06-04 | 1954-12-04 | 1955-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-06-04 | 1958-12-04 | 1959-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-06-04 | 1962-12-04 | 1963-06-05 | $7700.00 | Window Closed / Lapsed |