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Patent US2758173A successfully refreshed from Google Patents.
US2758173A
Expired / Lapsed
US
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Electric circuit chopper
Assignee: Iron Fireman Manufacturing Co
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Filing: 1954-03-22
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Granted: 1956-08-07
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Expires: 1974-03-22
Abstract
No abstract record available.
Inventors
- 👤 Jack C Riley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:45
CPC Classifications
H; H01; H01H; H01H50/00; H01H50/64; H01H50/74; H01H50/76
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1159189A
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US1676979A
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US2013513A
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US2207292A
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US2409054A
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US2423524A
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US2499420A
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US2433740A
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US2675440A
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US2678360A
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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) | 1959-08-07 | 1960-02-06 | 1960-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-08-07 | 1964-02-06 | 1964-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-08-07 | 1968-02-06 | 1968-08-07 | $7700.00 | Window Closed / Lapsed |