US2489155A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric control circuit
Assignee: ALLIS CHALMCRS Manufacturing Co
•
Filing: 1944-12-30
•
Granted: 1949-11-22
•
Expires: 1964-12-30
Abstract
No abstract record available.
Inventors
- 👤 Richter Walther
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:58
CPC Classifications
G; G01; G01R; G01R13/00; G01R13/20; G01R13/204
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1906246A
Cited
US2036532A
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US2265780A
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US2059004A
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US2219188A
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US2272070A
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US2255484A
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US2255485A
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US2303924A
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US2280990A
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US2350069A
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US2363810A
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US2414323A
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US2416290A
Cited
US2343988A
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US2406858A
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US2420516A
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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) | 1952-11-21 | 1953-05-23 | 1953-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-11-21 | 1957-05-23 | 1957-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-11-21 | 1961-05-23 | 1961-11-22 | $7700.00 | Window Closed / Lapsed |