US2896043A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric switch formed from magnets
Assignee: Stackpole Carbon Co
•
Filing: 1957-02-11
•
Granted: 1959-07-21
•
Expires: 1977-02-11
Abstract
No abstract record available.
Inventors
- 👤 Lewis D Andrews
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:04
CPC Classifications
H; H01; H01H; H01H36/00; H01H36/0073; H01H19/00; H01H19/54; H01H19/56; H01H19/563; H01H1/00; H01H1/50; H01H1/54; H01H2001/545
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2543014A
Cited
US2298573A
Cited
US2498683A
Cited
US2604561A
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US2548581A
Cited
US2742537A
Cited
US2770697A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-07-20 | 1963-01-19 | 1963-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-07-20 | 1967-01-19 | 1967-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-07-20 | 1971-01-19 | 1971-07-21 | $7700.00 | Window Closed / Lapsed |