US2488928A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electromagnetically operated switch
Assignee: Struthers Dunn Inc
•
Filing: 1946-02-04
•
Granted: 1949-11-22
•
Expires: 1966-02-04
Abstract
No abstract record available.
Inventors
- 👤 Charles A Packard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:48
CPC Classifications
H; H01; H01H; H01H51/00; H01H51/28; H01H51/288
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US511731A
Cited
US685549A
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US1219949A
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US1805021A
Cited
DE577924C
Cited
US2369296A
Cited
US2398657A
Cited
US2400559A
Cited
US2373998A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-11-21 | 1953-05-23 | 1953-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-11-21 | 1957-05-23 | 1957-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-11-21 | 1961-05-23 | 1961-11-22 | $7700.00 | Window Closed / Lapsed |