Patent US4134848A successfully refreshed from Google Patents.
US4134848A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composite for improved stripline board material
Assignee: United States Department of the Navy
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Filing: 1976-06-28
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Granted: 1979-01-16
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Expires: 1996-06-28
Abstract
Abstract A stripline board material of hollow glass microspheres chemically bonded to a coating material and physically held in a polymeric matrix, preferably homo- or co-polymers of ethylene, propylene and/or styrene. The coating material is a difunctional silane with one functional group bound to the glass and the other bound either to the matrix or to a copolymer of a structure similar to the structure of the matrix. In the latter case, the sphere-silane-copolymer forms an intimate mixture with the matrix.
Inventors
- 👤 Arnold Adicoff
- 👤 Eugene C. Martin
- 👤 Rena Y. Yee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:01
CPC Classifications
H; H01; H01B; H01B3/00; H01B3/18; H01B3/30; H01B3/44; C; C08; C08K; C08K9/00; C08K9/04; C08K9/06; H01B3/02; H01B3/08; H01B3/084; Y; Y10; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249953; Y10T428/249971; Y10T428/249974; Y10T428/31504; Y10T428/31551; Y10T428/31609; Y10T428/31612
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
90 words
Dielectric material comprising: hollow, air-filled, glass microspheres; a coating of a difunctional silane chemically bonded to said microspheres; an ethylene/acrylic acid copolymer chemically bonded to said silane; and a second polymer selected from the group consisting of homo- or copolymers of ethylene, propylene, and/or styrene, said second polymer forming a solid matrix physically containing said spheres and forming an intimate mixture with said spheres, said coating, and said ethylene/acrylic acid copolymer; said spheres being uniformly dispersed in said matrix so as to give uniform dielectric properties to said dielectric material.
Claim 2
Dependent Claim
90 words
Dielectric material comprising: hollow, air-filled, glass microspheres; a coating of a difunctional silane chemically bonded to said microspheres; an ethylene/acrylic acid copolymer chemically bonded to said silane; and a second polymer selected from the group consisting of homo- or copolymers of ethylene, propylene, and/or styrene, said second polymer forming a solid matrix physically containing said spheres and forming an intimate mixture with said spheres, said coating, and said ethylene/acrylic acid copolymer; said spheres being uniformly dispersed in said matrix so as to give uniform dielectric properties to said dielectric material.
Claim 3
Dependent Claim
10 words
The composition of claim 1 wherein said silane is 3-aminopropyltriethoxysilane.
Claim 4
Dependent Claim
100 words
A process for manufacturing dielectric material comprising the steps of: (a) Chemically coating hollow, air-filled glass microspheres with a difunctional silane; (b) bonding said silane to an ethylene/acrylic acid copolymer which is soluble in a second, thermoplastic polymer selected from the group consisting of homo- or copolymers of ethylene, propylene and/or styrene; (c) forming a finely dispersed mixture of said microspheres, said ethylene/acrylic acid copolymer, and said second, thermoplastic polymer; (d) heating said finely dispersed mixture whereby said ethylene/acrylic acid copolymer is dissolved in said second, thermoplastic polymer; (e) forming said mixture into a shape appropriate for said dielectric material.
Claim 5
Dependent Claim
100 words
A process for manufacturing dielectric material comprising the steps of: (a) Chemically coating hollow, air-filled glass microspheres with a difunctional silane; (b) bonding said silane to an ethylene/acrylic acid copolymer which is soluble in a second, thermoplastic polymer selected from the group consisting of homo- or copolymers of ethylene, propylene and/or styrene; (c) forming a finely dispersed mixture of said microspheres, said ethylene/acrylic acid copolymer, and said second, thermoplastic polymer; (d) heating said finely dispersed mixture whereby said ethylene/acrylic acid copolymer is dissolved in said second, thermoplastic polymer; (e) forming said mixture into a shape appropriate for said dielectric material.
Claim 6
Dependent Claim
13 words
The process of claim 3 further comprising the step of annealing said microspheres.
Claim 7
Dependent Claim
11 words
The process of claim 3 wherein said difunctional silane is 3-aminopropyltriethyoxysilane.
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) | 1982-01-15 | 1982-07-17 | 1983-01-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-01-15 | 1986-07-17 | 1987-01-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-01-15 | 1990-07-17 | 1991-01-16 | $7700.00 | Window Closed / Lapsed |