US5621369A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flexible magnet
Assignee: ANDERSON ADOLPH N
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Filing: 1995-09-18
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Granted: 1997-04-15
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Expires: 2015-09-18
Abstract
Abstract A flexible magnetic sheet is made of a rubbery synthetic material in which magnetic ferrite particles have been embedded and which one surface of the sheet has a grid pattern of ridges and depressions. The magnetic material is magnetized so that one pole is one each surface. The magnetic lines of force are generated substantially in a plane.
Inventors
- 👤 Harris L. Gardner
- 👤 heir William H. Gardner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:51
CPC Classifications
H; H01; H01F; H01F1/00; H01F1/01; H01F1/03; H01F1/032; H01F1/10; H01F1/11; H01F1/113; H01F1/117; A; A61; A61N; A61N2/00; A61N2/06; H01F7/00; H01F7/02; H01F7/0205; H01F7/021; H01F7/0215
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
49 words
A substantially flat body of magnetic particles of ferrite material embedded therein, said particles being magnetized to form N poles on one surface and S poles on the opposite surface, one surface having a plurality of valleys and hills in a pattern consisting of a grid of polygon depressions.
Claim 2
Dependent Claim
49 words
A substantially flat body of magnetic particles of ferrite material embedded therein, said particles being magnetized to form N poles on one surface and S poles on the opposite surface, one surface having a plurality of valleys and hills in a pattern consisting of a grid of polygon depressions.
Claim 3
Dependent Claim
11 words
A body as in claim 1 wherein the polygons are pyramidal.
Claim 4
Dependent Claim
47 words
A substantially flat body of magnetic particles of ferrite material embedded therein, said particles being magnetized to form N poles on one surface and S poles on the opposite surface, one surface having a plurality of valleys and hills in a pattern, said valleys having apertures therein.
Claim 5
Dependent Claim
47 words
A substantially flat body of magnetic particles of ferrite material embedded therein, said particles being magnetized to form N poles on one surface and S poles on the opposite surface, one surface having a plurality of valleys and hills in a pattern, said valleys having apertures therein.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2000-04-14 | 2000-10-14 | 2001-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-04-14 | 2004-10-14 | 2005-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-04-14 | 2008-10-14 | 2009-04-15 | $7700.00 | Window Closed / Lapsed |