US3629756A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thin sheet magnet
Assignee: Individual
•
Filing: 1970-03-23
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Granted: 1971-12-21
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Expires: 1990-03-23
Abstract
Abstract A thin sheet magnet comprised of a thin soft iron foil base with a magnetized barium-ferrite dispersion on one or both sides for use as a wall covering to provide direct mounting means for pictures and the like containing a thin foil backing or as an intermediary between a wall and a picture or the like.
Inventors
- 👤 Herman Holtz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:14
CPC Classifications
H; H01; H01F; H01F7/00; H01F7/02; H01F7/0205; H01F7/021; H01F7/0215; D; D06; D06N; D06N7/00; D06N7/0002; D06N7/0094; Y; Y10; Y10S; Y10S52/00; Y10S52/04
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
49 words
A thin flexible sheet magnet for use as a wall covering or the like which comprises: a base of thin magnetically soft iron foil and a barium-ferrite dispersion on at least one side of said foil, said dispersion being magnetized to form closely spaced alternating oppositely charged magnetic poles.
Claim 2
Dependent Claim
49 words
A thin flexible sheet magnet for use as a wall covering or the like which comprises: a base of thin magnetically soft iron foil and a barium-ferrite dispersion on at least one side of said foil, said dispersion being magnetized to form closely spaced alternating oppositely charged magnetic poles.
Claim 3
Dependent Claim
21 words
The permanent sheet magnet of claim 1 wherein said dispersion generally contains 90 percent barium-ferrite and 10 percent synthetic plastic material.
Claim 4
Dependent Claim
21 words
The permanent sheet magnet of claim 1 wherein said foil is generally from 0.001 to 0.003 of an inch in thickness.
Claim 5
Dependent Claim
21 words
The permanent sheet magnet of claim 1 wherein said dispersion is generally between 0.005 to 0.02 of an inch in thickness.
Claim 6
Dependent Claim
18 words
The thin sheet magnet as defined in claim 1 wherein said foil contains said dispersion on both sides.
References Cited (Backward Citations)
GB950273A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-12-20 | 1975-06-21 | 1975-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-20 | 1979-06-21 | 1979-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-20 | 1983-06-21 | 1983-12-21 | $7700.00 | Window Closed / Lapsed |