US2507940A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic switch
Assignee: MAY C SOUTHGATE
•
Filing: 1943-02-12
•
Granted: 1950-05-16
•
Expires: 1963-02-12
Abstract
No abstract record available.
Inventors
- 👤 May C Southgate
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:17
CPC Classifications
H; H01; H01H; H01H51/00; H01H51/34
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-05-15 | 1953-11-14 | 1954-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-05-15 | 1957-11-14 | 1958-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-05-15 | 1961-11-14 | 1962-05-16 | $7700.00 | Window Closed / Lapsed |