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Patent US2603943A successfully refreshed from Google Patents.
US2603943A
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Rotary hydraulic torque converter
Assignee: Rolls Royce PLC
•
Filing: 1946-09-24
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Granted: 1952-07-22
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Expires: 1966-09-24
Abstract
No abstract record available.
Inventors
- 👤 Evernden Harold Ivan Frederick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 03:27
CPC Classifications
F; F16; F16H; F16H47/00; F16H47/06; F16H47/08; F16H61/00; F16H61/38; F16H61/48; F16H61/50; F16H61/58; F16H61/62; Y; Y10; Y10S; Y10S74/00; Y10S74/01
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1960705A
Cited
US2014944A
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US2037252A
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US2042189A
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US2120896A
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US2204872A
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US2221393A
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US2293358A
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US2316390A
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US2332593A
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US2302714A
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US2298649A
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US2373122A
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US2397634A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-07-22 | 1956-01-21 | 1956-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-07-22 | 1960-01-21 | 1960-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-07-22 | 1964-01-21 | 1964-07-22 | $7700.00 | Window Closed / Lapsed |