US2516308A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable speed induction motor system
Assignee: Individual
•
Filing: 1946-12-26
•
Granted: 1950-07-25
•
Expires: 1966-12-26
Abstract
No abstract record available.
Inventors
- 👤 Jay W Forrester
- 👤 Robert R Everett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:53
CPC Classifications
G; G05; G05B; G05B11/00; G05B11/01; G05B11/012; G05B11/013; G05D; G05D3/00; G05D3/12; G05D3/121; G05D3/122
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1643405A
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US1898366A
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US1731264A
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US1934400A
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US2221517A
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US2320491A
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US2290657A
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US2303654A
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US2340875A
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US2385641A
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US2430213A
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US2446607A
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US2379689A
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US2404344A
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US2457792A
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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) | 1953-07-24 | 1954-01-23 | 1954-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-07-24 | 1958-01-23 | 1958-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-07-24 | 1962-01-23 | 1962-07-25 | $7700.00 | Window Closed / Lapsed |