US2644535A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid coupling clutch
Assignee: RTX Corp
•
Filing: 1949-06-29
•
Granted: 1953-07-07
•
Expires: 1969-06-29
Abstract
No abstract record available.
Inventors
- 👤 Alfred L Koup
- 👤 Arthur A Wagner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:41
CPC Classifications
F; F16; F16D; F16D33/00; B; B64; B64C; B64C27/00; B64C27/04; B64C27/12; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/19023; Y10T74/19037
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2256960A
Cited
US2386285A
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US2442840A
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US2351483A
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US2500002A
Cited
US2453791A
Cited
US2456942A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-07-06 | 1957-01-05 | 1957-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-07-06 | 1961-01-05 | 1961-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-07-06 | 1965-01-05 | 1965-07-07 | $7700.00 | Window Closed / Lapsed |