US4006479A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for dispersing metallic particles in a dielectric binder
Assignee: United States Department of the Air Force
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Filing: 1969-02-04
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Granted: 1977-02-01
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Expires: 1989-02-04
Abstract
Abstract A method for accomplishing the uniform distribution of finely divided metallic particles throughout a dielectric binder material. The finely divided metal particles are first admixed with a finely divided dielectric material and then further mixed with a powdered organic resinous binder. The composite mixture is further processed by hot compression molding of the admixed powders to form a radar energy absorbing material.
Inventors
- 👤 Donald J. LaCombe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:01
CPC Classifications
H; H01; H01Q; H01Q17/00; H01Q17/004
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
68 words
A method for dispersing sub-micron sized, finely divided metal particles through a solid, resinous, dielectric binder material comprising the step of admixing the finely divided metal particles with a powdered dielectric material, mixing the resulting admixture with a powdered resinous binder to form a composite mixture, and heating and compressing the composite mixture to form a solid, homogeneous dielectric body with finely divided metal particles evenly dispersed therein.
Claim 2
Independent Claim
68 words
A method for dispersing sub-micron sized, finely divided metal particles through a solid, resinous, dielectric binder material comprising the step of admixing the finely divided metal particles with a powdered dielectric material, mixing the resulting admixture with a powdered resinous binder to form a composite mixture, and heating and compressing the composite mixture to form a solid, homogeneous dielectric body with finely divided metal particles evenly dispersed therein.
Claim 3
Dependent Claim
20 words
A method in accordance with claim 1 wherein said dielectric material is silicon dioxide and said binder material is polystyrene.
Claim 4
Dependent Claim
13 words
A method in accordance with claim 1 wherein said metal particles are iron.
Claim 5
Dependent Claim
26 words
A radar energy absorbing material comprising a solid, homogeneous blend of sub-micron sized, finely divided metal particles, a finely divided dielectric material and a resinous binder.
Claim 6
Dependent Claim
26 words
A radar energy absorbing material comprising a solid, homogeneous blend of sub-micron sized, finely divided metal particles, a finely divided dielectric material and a resinous binder.
Claim 7
Dependent Claim
15 words
A radar energy absorbing material in accordance with claim 4 wherein said metal is iron.
Claim 8
Dependent Claim
23 words
A radar energy absorbing material in accordance with claim 4 wherein said dielectric material is silicon dioxide and said resinous binder is polystyrene.
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) | 1980-02-01 | 1980-08-02 | 1981-02-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-02-01 | 1984-08-02 | 1985-02-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-02-01 | 1988-08-02 | 1989-02-01 | $7700.00 | Window Closed / Lapsed |