Patent US2565467A successfully refreshed from Google Patents.
US2565467A
Expired / Lapsed
US
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Electromagnetically operated switch
Assignee: JA Crabtree and Co Ltd
•
Filing: 1948-08-10
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Granted: 1951-08-28
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Expires: 1968-08-10
Abstract
No abstract record available.
Inventors
- 👤 Besag Ernst
- 👤 Hill Walter Edward
- 👤 Wintle Thomas Daniel Guy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:25
CPC Classifications
H; H01; H01H; H01H71/00; H01H71/10; H01H71/12; H01H71/46
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2172633A
Cited
US2275924A
Cited
US2261632A
Cited
US2308433A
Cited
US2399575A
Cited
US2394090A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-08-27 | 1955-02-26 | 1955-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-08-27 | 1959-02-26 | 1959-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-08-27 | 1963-02-26 | 1963-08-28 | $7700.00 | Window Closed / Lapsed |