Patent US2785241A successfully refreshed from Google Patents.
US2785241A
Expired / Lapsed
US
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Electric circuit controllers
Assignee: British Thomson Houston Co Ltd
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Filing: 1953-11-10
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Granted: 1957-03-12
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Expires: 1973-11-10
Abstract
No abstract record available.
Inventors
- 👤 Watson John Ansley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 14:30
CPC Classifications
H; H01; H01H; H01H13/00; H01H13/02; H01H13/12; F; F22; F22D; F22D1/00; F22D1/36; F23; F23M; F23M20/00; F28; F28D; F28D19/00; F28D19/04; H01H1/00; H01H1/12; H01H1/14; H01H1/20; H01H1/24
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-03-11 | 1960-09-10 | 1961-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-03-11 | 1964-09-10 | 1965-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-03-11 | 1968-09-10 | 1969-03-12 | $7700.00 | Window Closed / Lapsed |