Patent US3223898A successfully refreshed from Google Patents.
US3223898A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable magnet
Assignee: Individual
•
Filing: 1962-05-11
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Granted: 1965-12-14
•
Expires: 1982-05-11
Abstract
No abstract record available.
Inventors
- 👤 Ahmet K Bey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 04:52
CPC Classifications
H; H01; H01F; H01F7/00; H01F7/02; H01F7/0205; H01F7/0226
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
117 words
A VARIABLE MAGNETIC DEVICE COMPRISING A PERMANENTLY MAGNETIZED SLEEVE HAVING ITS POLES LOCATED ON OPPOSITE SIDES OF THE LONGITUDINAL AXIS THEREOF, A PERMANENTLY MAGNETIZED CORE WITHIN SAID SLEEVE HAVING ITS POLES LOCATED ON OPPOSITE SIDES OF ITS LONGITUDINAL AXIS, A POLE PIECE OVERLYING AND AFFIXED TO THE SOUTH POLE OF THE SLEEVE AND ANOTHER POLE PIECE OVERLYING AND AFFIXED TO THE NORTH POLE OF THE SLEEVE, SAID CORE AND SLEEVE BEING RELATIVELY ROTATABLE AND SAID POLE PIECES BEING ROTATABLE WITH THE SLEEVE WHEREBY THE INTENSITY OF THE MAGNETIC FIELD OF THE DEVICE MAY BE SELECTIVELY VARIED OVER A WIDE RANGE BY MODIFYING THE RELATIVE DISPOSITION OF THE POLES OF THE CORE AND THE POLES OF THE SLEEVE.
References Cited (Backward Citations)
US2287286A
Cited
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Cited
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Cited
US2471067A
Cited
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Cited
US2722617A
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US2793552A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-12-13 | 1969-06-14 | 1969-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-13 | 1973-06-14 | 1973-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-13 | 1977-06-14 | 1977-12-14 | $7700.00 | Window Closed / Lapsed |