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Patent US2505979A successfully refreshed from Google Patents.
US2505979A
Expired / Lapsed
US
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Contact assembly for plug-in devices
Assignee: Hitachi Rail STS USA Inc
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Filing: 1947-04-24
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Granted: 1950-05-02
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Expires: 1967-04-24
Abstract
No abstract record available.
Inventors
- 👤 Paul N Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:49
CPC Classifications
H; H01; H01R; H01R13/00; H01R13/40; H01R13/42; H01R13/436; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49117; Y10T29/49204
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1917009A
Cited
US2220810A
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US2124182A
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US2258122A
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US2397283A
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US2391324A
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US2457703A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-05-01 | 1953-10-31 | 1954-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-05-01 | 1957-10-31 | 1958-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-05-01 | 1961-10-31 | 1962-05-02 | $7700.00 | Window Closed / Lapsed |