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Patent US2531452A successfully refreshed from Google Patents.
US2531452A
Expired / Lapsed
US
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Silent electric switch
Assignee: Individual
•
Filing: 1945-11-24
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Granted: 1950-11-28
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Expires: 1965-11-24
Abstract
No abstract record available.
Inventors
- 👤 Mannon Lloyd
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:38
CPC Classifications
H; H01; H01H; H01H29/00; H01H29/20; H01H29/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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Cited
US529578A
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GB190321551A
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US843070A
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US919535A
Cited
GB190720670A
Cited
US1569965A
Cited
US1658619A
Cited
US1902926A
Cited
US1982717A
Cited
US2314714A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-11-27 | 1954-05-29 | 1954-11-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-11-27 | 1958-05-29 | 1958-11-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-11-27 | 1962-05-29 | 1962-11-28 | $7700.00 | Window Closed / Lapsed |