USRE29451E
Expired / Lapsed
US
⏱️ 0.0 years remaining
Light colored magnetic rubber
Assignee: Max Baermann
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Filing: 1976-09-24
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Granted: 1977-10-18
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Expires: 1996-09-24
Abstract
Abstract A rubber-like flexible permanent magnet comprised of a mixture of granular, high coercivity, permanent magnet material and a rubber-like flexible binder material. A substantial e.g. 90 percent amount of the permanent magnetic material have a grain size of from 0.125 to 0.3 mm. More magnetic material may be used with the same flexibility. Light colored powders such as titanium oxide, or aluminum can be added or the grains coated with a metallic layer using vacuum deposition or a chemical bath deposition to make the final magnet light in color.
Inventors
- 👤 Max Baermann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 05:54
CPC Classifications
H; H01; H01F; H01F7/00; H01F7/02; H01F7/0205; H01F7/021; H01F7/0215; H01F1/00; H01F1/01; H01F1/03; H01F1/032; H01F1/10; H01F1/11; H01F1/113; H01F1/117
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
95 words
A light colored, rubber-like flexible permanent magnet comprised of a mixture of a rubber-like flexible binder, a permanent magnet material of high coercivity, as e.g., barium-, strontium-, or lead ferrite powder, and a material capable of giving the magnet a light color said permanent magnet material consisting essentially of relatively coarse grains having a grain size of 0.06 - 0.35 mm, the grain size mainly ranging from 0.1 - 0.3 mm, and the proportion of fine and finest permanent magnet powder particles, with respect to the grain size, being minimized to a negligibly small amount.
Claim 2
Dependent Claim
95 words
A light colored, rubber-like flexible permanent magnet comprised of a mixture of a rubber-like flexible binder, a permanent magnet material of high coercivity, as e.g., barium-, strontium-, or lead ferrite powder, and a material capable of giving the magnet a light color said permanent magnet material consisting essentially of relatively coarse grains having a grain size of 0.06 - 0.35 mm, the grain size mainly ranging from 0.1 - 0.3 mm, and the proportion of fine and finest permanent magnet powder particles, with respect to the grain size, being minimized to a negligibly small amount.
Claim 3
Dependent Claim
85 words
The permanent magnet according to claim 1 wherein the total volume of powdered permanent magnet material is composed of a proportion of less than 5 percent by volume of grains having a grain size of 0.1 mm and less, 30-50 percent by volume of grains having a grain size of 0.1 - 0.2 mm, 30-50 percent by vol. of grains having a grain size of 0.2 - 0.3 mm, and 5-10 percent by vol. of grains having a gain size of 0.3 - 0.35 mm.
Claim 4
Dependent Claim
26 words
The permanent magnet according to claim 1 wherein the light colored material comprises 2-15 percent by vol. of finely divided metal powder, as e.g., aluminum powder.
Claim 5
Dependent Claim
26 words
The permanent magnet according to claim 2 wherein the light colored material comprises 2-15 percent by vol. of finely divided metal powder, as e.g., aluminum powder.
Claim 6
Dependent Claim
32 words
The permanent magnet according to claim 1 wherein the permanent magnet particles are provided with a colored coating, as e.g., of nickel, cadmium, copper, said coating being effected by a chemical process.
Claim 7
Dependent Claim
25 words
The permanent magnet according to claim 1 wherein the permanent magnet powder particles are coated with aluminum by means of vapor plating in a vacuum.
Claim 8
Dependent Claim
32 words
The permanent magnet according to claim 2 wherein the permanent magnet particles are provided with a colored coating, as e.g., of nickel, cadmium, copper, said coating being effected by a chemical process.
Claim 9
Dependent Claim
25 words
The permanent magnet according to claim 2 wherein the permanent magnet powder particles are coated with aluminum by means of vapor plating in a vacuum.
Claim 10
Dependent Claim
214 words
The permanent magnet according to claim 1 wherein the proportion of fine and finest permanent magnet powder particles, with respect to the grain size, is removed. .Iadd. 10. A rubber-like flexible permanent magnet comprised of a mixture of a rubber-like flexible binder and a permanent magnet material of high coercitivity, as e.g., barium-, strontium-, of lead ferrite powder, said permanent magnet material consisting essentially of relatively coarse grains having a grain size of 0.06-0.35 mm, the grain size mainly ranging from 0.1-0.3 mm, and the proportion of fine and finest permanent magnet powder particles, with respect to grain size being minimized to a negligibly small amount. .Iaddend..Iadd. 11. The permanent magnet according to claim 10 wherein the total volume of powdered magnet material is composed of a proportion of less than 5 percent by volume of grains having a grain size of 0.1 mm and less, 30-50 percent by volume of grains having a grain size of 0.1-0.2 mm, 30-50 percent by volume of grains having a grains size of 0.2-0.3 mm, and 5-10 percent by volume of grains having a grain size of 0.3-0.35 mm. .Iaddend..Iadd. 12. The permanent magnet according to claim 10 wherein the proportion of fine and finest permanent magnet powder particles, with respect to grain size, is removed. .Iaddend.
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) | 1980-10-17 | 1981-04-18 | 1981-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-10-17 | 1985-04-18 | 1985-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-10-17 | 1989-04-18 | 1989-10-18 | $7700.00 | Window Closed / Lapsed |