US3168686A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Permanent magnet
Assignee: US Philips Corp
•
Filing: 1959-11-09
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Granted: 1965-02-02
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Expires: 1979-11-09
Abstract
No abstract record available.
Inventors
- 👤 King Hewson Nicholas Graham
- 👤 Murphy Bernard Thomas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:13
CPC Classifications
H; H01; H01F; H01F7/00; H01F7/02; H01F7/0205; H01F7/021
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
98 words
A PERMANENT MAGNET COMPRISING A BODY HAVING THREE ADJOINING AND ALIGNED PERMANENT MAGNET PORTIONS FORMING ALONG ONE FACE OF THE MAGNET A SUBSTANTIALLY CONTINUOUS SURFACE, THE OUTER TWO MAGNET PORTIONS BEING MAGNETIZED IN SUBSTANTIALLY OPPOSITE DIRECTIONS SUBSTANTIALLY ORTHOGONALLY TO THE SAID ONE FACE, THE CENTER MAGNET PORTION BEING MAGNETIZED IN A DIRECTION SUBSTANTIALLY AT RIGHT ANGLES TO THE MAGNETIZING DIRECTIONS OF THE OUTER MAGNET PORTIONS AND IN A PLANE SUBSTANTIALLY PARALLEL TO THE PLANE DEFINED BY THE MAGNETIZING DIRECTIONS OF SAID OUTER TWO MAGNET PORTIONS, THE MAGNET PRODUCING A STRONG, USEFUL EXTERNAL FIELD ADJACENT THE SAID ONE FACE.
Claim 2
Dependent Claim
98 words
A PERMANENT MAGNET COMPRISING A BODY HAVING THREE ADJOINING AND ALIGNED PERMANENT MAGNET PORTIONS FORMING ALONG ONE FACE OF THE MAGNET A SUBSTANTIALLY CONTINUOUS SURFACE, THE OUTER TWO MAGNET PORTIONS BEING MAGNETIZED IN SUBSTANTIALLY OPPOSITE DIRECTIONS SUBSTANTIALLY ORTHOGONALLY TO THE SAID ONE FACE, THE CENTER MAGNET PORTION BEING MAGNETIZED IN A DIRECTION SUBSTANTIALLY AT RIGHT ANGLES TO THE MAGNETIZING DIRECTIONS OF THE OUTER MAGNET PORTIONS AND IN A PLANE SUBSTANTIALLY PARALLEL TO THE PLANE DEFINED BY THE MAGNETIZING DIRECTIONS OF SAID OUTER TWO MAGNET PORTIONS, THE MAGNET PRODUCING A STRONG, USEFUL EXTERNAL FIELD ADJACENT THE SAID ONE FACE.
References Cited (Backward Citations)
US2722617A
Cited
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Cited
US2727650A
Cited
US2830207A
Cited
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Cited
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Cited
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Cited
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-02-02 | 1968-08-03 | 1969-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-02-02 | 1972-08-03 | 1973-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-02-02 | 1976-08-03 | 1977-02-02 | $7700.00 | Window Closed / Lapsed |