Patent US3609104A successfully refreshed from Google Patents.
US3609104A
Expired / Lapsed
US
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Electrically conductive gasket and material thereof
Assignee: Ercon Inc
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Filing: 1968-02-15
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Granted: 1971-09-28
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Expires: 1988-02-15
Abstract
Abstract An article loaded with a filler providing good electrical or heat conductivity is formed by mixing the filler with particles of nonflowing compressible resin, as well as a sufficient amount of flowable resin. The flowable resin is then hardened. The nonflowing resin particles concentrate the filler particles in a network of high conductivity pathways and in this way they provide high conductivity in the macrostructure with a very low overall concentration of filler particles; and at the same time they enhance the resilience of the finished article. They also prevent settling of the filler particles prior to hardening, thereby maintaining a fairly homogeneous dispersion of the filler.
Inventors
- 👤 John E Ehrreich
- 👤 Adrian R Reti
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:50
CPC Classifications
C; C08; C08L; C08L101/00; C08L63/00; C08L77/00; C08L77/06; C08L77/08; C08L83/00; C08L83/04; H; H01; H01B; H01B1/00
Claims Analysis
Total Claims: 29
Claim 1
Independent Claim
18 words
A method as defined in claim 1 wherein the nonflowable particles are chemically bonded to the flowable resin.
Claim 2
Dependent Claim
37 words
The method defined in claim 1 in which A. said nonflowable particles are of a cured thermosetting resin, B. said flowable resin is an uncured thermosetting resin, and C. hardening is accomplished by curing said uncured resin.
Claim 3
Dependent Claim
16 words
The method defined in claim 1 in which said particles are particles of a pressure-distortable foam.
Claim 4
Dependent Claim
12 words
The method defined in claim 3 in which said particles are resilient.
Claim 5
Dependent Claim
14 words
The method defined in claim 1 in which said nonflowable resin particles are resilient.
Claim 6
Dependent Claim
20 words
The method defined in claim 1 in which said nonflowable particles contain sufficient carbon black to provide electrical conductivity therein.
Claim 7
Dependent Claim
15 words
The method defined in claim 3 in which said filler is an electrically conducting filler.
Claim 8
Dependent Claim
21 words
The method defined in claim 8 in which said nonflowable resin particles contain sufficient carbon black to provide electrical conductivity therein.
Claim 9
Dependent Claim
29 words
The method defined in claim 1 in which the mixing step is accomplished by first mixing said flowable resin with said nonflowable resin particles and then adding said filler.
Claim 10
Dependent Claim
29 words
The method defined in claim 3 in which the mixing step is accomplished by first mixing said flowable resin with said nonflowable resin particLes and then adding said filler.
Claim 11
Dependent Claim
26 words
The method defined in claim 1 in which said mixture is compressed during hardening, thereby to compress said pressure-distortable particles and reduce the interstices between them.
Claim 12
Dependent Claim
26 words
The method defined in claim 3 in which said mixture is compressed during hardening, thereby to compress said pressure-distortable particles and reduce the interstices between them.
Claim 13
Dependent Claim
25 words
The method defined in claim 1 in which said filler is a metallic filler in sufficient amount to provide electrical conductivity through said plastic article.
Claim 14
Dependent Claim
25 words
The method defined in claim 14, in which the proportion of said filler in said mixture is from 1 percent to 45 percent by volume.
Claim 15
Dependent Claim
32 words
The method defined in claim 14 in which said filler is in the form of flakelike particles sufficiently smaller than said nonflowable resin particles to form conductive coatings on said resin particles.
Claim 16
Dependent Claim
17 words
The method defined in claim 14 in which said filler is in the form of metallic fibers.
Claim 17
Dependent Claim
21 words
The method defined in claim 17 in which said nonflowable resin particles contain sufficient carbon black to render them electrically conductive.
Claim 18
Dependent Claim
18 words
The method defined in claim 18 in which said filler is in the form of stainless steel fibers.
Claim 19
Dependent Claim
24 words
The method defined in claim 3 in which said nonflowable particles are further cured after compression thereof, to provide a relatively incompressible plastic article.
Claim 20
Independent Claim
93 words
A method of making an electrically conductive plastic article, said method comprising the steps of A. providing a first mixture of pressure-distortable, cured thermosetting resin particles and an uncured thermosetting resin, B. providing a second mixture comprising said first mixture and metallic particles sufficient in quantity to provide electrical conductivity in said article, C. applying pressure to said second mixture thereby to distort said cured particles and reduce the interstices between them, D. curing said uncured resin while said second mixture is under pressure, and E. forming said article from said second mixture.
Claim 21
Dependent Claim
32 words
The method defined in claim 21, in which said forming step is accomplished by curing said uncured resin while said mixture is in a mold conforming to the shape of said article.
Claim 22
Dependent Claim
25 words
The method defined in claim 21 in which said forming step is accomplished by extruding said second mixture during the curing of said uncured resin.
Claim 23
Dependent Claim
33 words
The method defined in claim 21 in which said uncured resin is a resin that chemically bonds to said cured resin particles, thereby to provide a monolithic matrix binder for said conducting filler.
Claim 24
Dependent Claim
24 words
The method defined in claim 24 in which said cure particles are of a silicone resin and said uncured resin is a silicone resin.
Claim 25
Dependent Claim
18 words
The method defined in claim 25 in which said cured particles are particles of the pressure-distortable silicone foam.
Claim 26
Dependent Claim
42 words
An electrically conducting caulking mixture comprising the mixture of A. nonflowable, pressure-distortable resin particles formed of a cured thermosetting resin, B. flowable resin, and C. metallic particles sufficient in quantity to provide electrical conductivity through said mixture after hardening said flowable resin.
Claim 27
Dependent Claim
47 words
A mixture for making an electrically conducting plastic article, said mixture comprising A. nonflowable, pressure-distortable resin particles formed of a cured thermosetting resin B. flowable, hardenable resin, and C. metallic particles sufficient in quantity to provide electrical conductivity through said mixture after hardening of said flowable resin.
Claim 28
Independent Claim
63 words
A method of making a conductive plastic article, said method comprising the steps of A. coating particles of a pressure-distortable, nonflowable resin formed of a cured thermosetting resin with particles selected from the group consisting of carbon and metal particles, and B. binding the coated particles under compression by means of a bonding medium that chemically bonds to the material of said particles.
Claim 29
Independent Claim
53 words
A method of making a conductive plastic article, said method comprising the steps of forming a mixture of (a) pressure-distortable nonflowable resin particles of a cured thermosetting resin, with (b) a flowable resin and (c) alumina as a thermally conductive filler, while maintaining the particles in particulate form, and then hardening the mixture.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-27 | 1975-03-29 | 1975-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-27 | 1979-03-29 | 1979-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-27 | 1983-03-29 | 1983-09-28 | $7700.00 | Window Closed / Lapsed |