Patent US2535977A successfully refreshed from Google Patents.
US2535977A
Expired / Lapsed
US
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Magnetic stick relay
Assignee: SPX Technologies Inc
•
Filing: 1949-09-27
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Granted: 1950-12-26
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Expires: 1969-09-27
Abstract
No abstract record available.
Inventors
- 👤 Joseph E Willing
- 👤 Sr George E Duffy
- 👤 Carl E Stevenson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:13
CPC Classifications
H; H01; H01H; H01H51/00; H01H51/01
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US362135A
Cited
US1176421A
Cited
US1792318A
Cited
US2130871A
Cited
US2258123A
Cited
US2376534A
Cited
US2301992A
Cited
US2414583A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-12-25 | 1954-06-26 | 1954-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-12-25 | 1958-06-26 | 1958-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-12-25 | 1962-06-26 | 1962-12-26 | $7700.00 | Window Closed / Lapsed |