US4014730A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymer densified graphite sheet as impervious connector for an electrical capacitor
Assignee: Standard Oil Co
•
Filing: 1974-07-31
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Granted: 1977-03-29
•
Expires: 1994-07-31
Abstract
Abstract The connector of this invention comprises a thin, flexible sheet of graphite in which the pores and voids of the graphite are filled with a polymer to render the graphite impervious to the electrolyte of the capacitor.
Inventors
- 👤 Theodore B. Selover, Jr.
- 👤 Donald L. Boos
- 👤 Thomas H. Hacha
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:26
CPC Classifications
H; H01; H01G; H01G11/00; H01G11/78; H01G11/80; H01G11/82; Y; Y02; Y02E; Y02E60/00; Y02E60/13; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T428/00; Y10T428/30
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
165 words
A process for preparing an electron-conducting, ion-insulating connector for use in an electrical capacitor comprising the following steps in sequence: a. coating a single surface of a thin, flexible, porous, sheet of graphite having a thickness within the range of about 0.3 to 10 mils with a viscous paste of an elastomer containing a vulcanizing agent, said elastomer being a member selected from the group consisting of butyl rubber, copolymers of butadiene-urethane and vinylidene fluoride-hexafluoropropylene; b. covering the elastomer-coated surface on the graphite with a second sheet of the graphite, forming a composite; c. compressing the composite formed in (b) under sufficient pressure to impregnate the two sheets of graphite with elastomer and to exude any excess elastomer from therebetween so as to form a laminate of essentially the two sheets of elastomer-impregnated graphite; and d. vulcanizing the elastomer-impregnated laminate obtained in (c) at a temperature of from about 25° to 220° C and a at a pessure of from about 15 to 15,000 psi.
Claim 2
Dependent Claim
165 words
A process for preparing an electron-conducting, ion-insulating connector for use in an electrical capacitor comprising the following steps in sequence: a. coating a single surface of a thin, flexible, porous, sheet of graphite having a thickness within the range of about 0.3 to 10 mils with a viscous paste of an elastomer containing a vulcanizing agent, said elastomer being a member selected from the group consisting of butyl rubber, copolymers of butadiene-urethane and vinylidene fluoride-hexafluoropropylene; b. covering the elastomer-coated surface on the graphite with a second sheet of the graphite, forming a composite; c. compressing the composite formed in (b) under sufficient pressure to impregnate the two sheets of graphite with elastomer and to exude any excess elastomer from therebetween so as to form a laminate of essentially the two sheets of elastomer-impregnated graphite; and d. vulcanizing the elastomer-impregnated laminate obtained in (c) at a temperature of from about 25° to 220° C and a at a pessure of from about 15 to 15,000 psi.
Claim 3
Dependent Claim
23 words
The process of claim 1 wherein the thickness of the graphite sheet is within the range from about 0.3 mils to 10 mils.
Claim 4
Dependent Claim
11 words
The process of claim 1 wherein the elastomer is butyl rubber.
Claim 5
Dependent Claim
20 words
the process of claim 3 wherein the graphite sheet is composed of expanded, compressed graphite particles having anisotropic electrical properties.
Claim 6
Dependent Claim
35 words
The process of claim 4 wherein the elastomer-impregnated graphite sheet is curved by vulcanizing at a temperature within the range of 105° to 175° C and at a pressure of from 250 to 13,500 psi.
References Cited (Backward Citations)
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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) | 1980-03-28 | 1980-09-27 | 1981-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-03-28 | 1984-09-27 | 1985-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-03-28 | 1988-09-27 | 1989-03-29 | $7700.00 | Window Closed / Lapsed |