Patent US5214404A successfully refreshed from Google Patents.
US5214404A
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US
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Continuously magnetizing magnet
Assignee: Japan Life Co Ltd
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Filing: 1991-07-31
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Granted: 1993-05-25
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Expires: 2011-07-31
Abstract
Abstract A continuously magnetizing magnet for use in bedding for magnetic medical treatment is made of magnetic material whose semicircular crests and semicircular bases are alternately combined in series and the crests are magnetized so that they have alternately N and S magnetic poles. As the magnetic poles are isolated via the base, the magnetic lines of force are vertically generated and the magnetic density at a position upwardly far from both magnetic poles increases.
Inventors
- 👤 Takayoshi Yamaguchi
- 👤 Isamu Kobayashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:01
CPC Classifications
H; H01; H01F; H01F7/00; H01F7/02; H01F7/0273; H01F7/0294; H01F7/0205; H01F7/021; H01F7/0215
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
79 words
A continuously magnetizing magnet comprising a body of magnetic material having a flat bottom side and a top side spaced therefrom, said top side having a plurality of semicircular crests and semicircular bases joined in series along the longitudinal axis of said body, and both said crests and said bases being spaced from the flat side, said crests being magnetized so that they are alternately N and S magnetic poles on said top side of said magnetic material body.
Claim 2
Dependent Claim
79 words
A continuously magnetizing magnet comprising a body of magnetic material having a flat bottom side and a top side spaced therefrom, said top side having a plurality of semicircular crests and semicircular bases joined in series along the longitudinal axis of said body, and both said crests and said bases being spaced from the flat side, said crests being magnetized so that they are alternately N and S magnetic poles on said top side of said magnetic material body.
Claim 3
Dependent Claim
38 words
A continuously magnetizing magnet as claimed in claim 1, wherein said body of magnetic material is a ferrite magnet prepared from material selected from a group consisting of plastics and rubber containing rare earth magnetic powder kneaded therein.
References Cited (Backward Citations)
US4197618A
Cited
JPS5241518A
Cited
US4391270A
Cited
US4480155A
Cited
JPS60192738A
Cited
US4798194A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-05-24 | 1996-11-23 | 1997-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-05-24 | 2000-11-23 | 2001-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-05-24 | 2004-11-23 | 2005-05-25 | $7700.00 | Window Closed / Lapsed |