US2651920A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary turbine type torque converter for varying speed ratios
Assignee: Individual
•
Filing: 1946-05-31
•
Granted: 1953-09-15
•
Expires: 1966-05-31
Abstract
No abstract record available.
Inventors
- 👤 Oliver W Roosevelt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:02
CPC Classifications
F; F16; F16H; F16H47/00; F16H47/06; F16H47/08; F16H61/00; F16H61/38; F16H61/48; F16H61/50; F16H61/52; F16H61/56; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/19009
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2235673A
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US2339483A
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US2341921A
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US2313645A
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US2352482A
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US2389174A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-09-14 | 1957-03-16 | 1957-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-09-14 | 1961-03-16 | 1961-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-09-14 | 1965-03-16 | 1965-09-15 | $7700.00 | Window Closed / Lapsed |