US3565495A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic suspension apparatus
Assignee: Cambridge Thermionic Corp
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Filing: 1969-08-05
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Granted: 1971-02-23
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Expires: 1989-08-05
Abstract
Abstract MAGNETIC SUSPENSION APPARATUS FOR SUSPENDING A MOVABLE BODY BETWEEN A PAIR OF ELECTROMAGNETS EXERTING RADIAL CENTERING FORCES AND OPPOSED AXIAL PULLING FORCES IN WHICH EACH ELECTROMAGNET COMPRISES AN INNER CYLINDRICAL PERMEABLE MEMBER AND AN OUTER CYLINDRICAL PERMEABLE MEMBER COAXIAL THEREWITH HAVING AN ELECTROMAGNET COIL SITUATED IN THE SPACE BETWEEN THESE TWO CYLINDRICAL MEMBERS.
Inventors
- 👤 Joseph Lyman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:25
CPC Classifications
F; F16; F16C; F16C32/00; F16C32/04; F16C32/0406; F16C32/044; F16C32/0474; F16C32/0476; Y; Y10; Y10T; Y10T74/00; Y10T74/12; Y10T74/1261; Y10T74/1264
Claims Analysis
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-22 | 1974-08-24 | 1975-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-22 | 1978-08-24 | 1979-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-22 | 1982-08-24 | 1983-02-23 | $7700.00 | Window Closed / Lapsed |