US2638003A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Operating mechanism for high voltage electric circuit interrupting devices
Assignee: S&C Electric Co
•
Filing: 1950-02-15
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Granted: 1953-05-12
•
Expires: 1970-02-15
Abstract
No abstract record available.
Inventors
- 👤 Sigurd I Lindell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:28
CPC Classifications
H; H01; H01H; H01H3/00; H01H3/22; H01H3/30; H01H3/3042; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18888; Y10T74/18896
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-05-11 | 1956-11-10 | 1957-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-05-11 | 1960-11-10 | 1961-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-05-11 | 1964-11-10 | 1965-05-12 | $7700.00 | Window Closed / Lapsed |