US2420485A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical switch with kinetic energy dissipating means
Assignee: Railway & Industrial Eng Co
•
Filing: 1942-08-05
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Granted: 1947-05-13
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Expires: 1962-08-05
Abstract
No abstract record available.
Inventors
- 👤 Samuel H Kast
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:33
CPC Classifications
H; H01; H01H; H01H31/00; H01H31/003
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2095554A
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US2254914A
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US2306117A
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US2309909A
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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) | 1950-05-12 | 1950-11-11 | 1951-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-05-12 | 1954-11-11 | 1955-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-05-12 | 1958-11-11 | 1959-05-13 | $7700.00 | Window Closed / Lapsed |