US2650684A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic fluid clutch
Assignee: Elsag Bailey Inc
•
Filing: 1949-05-20
•
Granted: 1953-09-01
•
Expires: 1969-05-20
Abstract
No abstract record available.
Inventors
- 👤 Jr James F English
- 👤 Anthony J Hornfeck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:36
CPC Classifications
F; F16; F16D; F16D37/00; F16D37/02; F16D2037/002; F16D2037/005; Y; Y10; Y10S; Y10S74/00; Y10S74/04; Y10T; Y10T74/00; Y10T74/18; Y10T74/18056; Y10T74/18088
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1416047A
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US1641377A
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US2121082A
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US1991229A
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US2153195A
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US2214901A
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US2444329A
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US2546344A
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US2575360A
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US2557140A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-08-31 | 1957-03-02 | 1957-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-31 | 1961-03-02 | 1961-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-31 | 1965-03-02 | 1965-09-01 | $7700.00 | Window Closed / Lapsed |