US2872541A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical speed-responsive switch with time-delay
Assignee: Individual
•
Filing: 1956-05-22
•
Granted: 1959-02-03
•
Expires: 1976-05-22
Abstract
No abstract record available.
Inventors
- 👤 Henry H Oppenheim
- 👤 Stevens Theodore Wilson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:57
CPC Classifications
H; H01; H01H; H01H43/00; H01H43/24; H01H43/28; Y; Y10; Y10S; Y10S60/00; Y10S60/907; Y10T; Y10T137/00; Y10T137/0971; Y10T137/8593; Y10T137/87257
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2259810A
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US700449A
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US767138A
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US926389A
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US2071042A
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US2345280A
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US2328684A
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US2541887A
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US2396984A
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US2389164A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-02-02 | 1962-08-04 | 1963-02-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-02-02 | 1966-08-04 | 1967-02-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-02-02 | 1970-08-04 | 1971-02-03 | $7700.00 | Window Closed / Lapsed |