Patent US3980871A successfully refreshed from Google Patents.
US4440973A
Expired / Lapsed
US
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Coaxial cables
Assignee: Champlain Cable Corp
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Filing: 1982-03-17
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Granted: 1984-04-03
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Expires: 2002-03-17
Abstract
Abstract A dielectric system for coaxial electrical conductors is provided. The dielectric system separates an inner and outer conductor and is composed of a first layer of braided high tensile strength polymeric fluorocarbon filaments in an open weave surrounding the inner conductor. Surrounding the layer of braided filaments is a continuous layer of a polymeric film which is in turn surrounded by a continuous layer of a crosslinkable polymeric lacquer enclosing both the layer of braided filaments and the layer of polymeric film.
Inventors
- 👤 Richard E. Hawkins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 01:49
CPC Classifications
H; H01; H01B; H01B11/00; H01B11/18; H01B11/1834
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
147 words
A coaxial cable having improved strength properties over a wide temperature range, comprising: (a) an inner conductor; (b) a dielectric system comprising: (i) a first layer of braided high tensile strength polymeric fluorocarbon filaments surrounding said inner conductor in an open weave along the length of the inner conductor, said filaments having a tensile strength of at least 40,000 psi and a dielectric constant of less than 2.8; (ii) a second layer consisting of a polymeric film which remains stable at temperatures of up to 150° C. surrounding circumferentially the first layer and providing a continuous skin enclosing the first layer; and (iii) a third layer consisting of a crosslinked polymeric lacquer surrounding circumferentially the second layer and providing a continuous skin enclosing the second layer; (c) an outer conductor disposed circumferentially about the dielectric system; and (d) an outer protective layer surrounding circumferentially the outer conductor.
Claim 2
Dependent Claim
147 words
A coaxial cable having improved strength properties over a wide temperature range, comprising: (a) an inner conductor; (b) a dielectric system comprising: (i) a first layer of braided high tensile strength polymeric fluorocarbon filaments surrounding said inner conductor in an open weave along the length of the inner conductor, said filaments having a tensile strength of at least 40,000 psi and a dielectric constant of less than 2.8; (ii) a second layer consisting of a polymeric film which remains stable at temperatures of up to 150° C. surrounding circumferentially the first layer and providing a continuous skin enclosing the first layer; and (iii) a third layer consisting of a crosslinked polymeric lacquer surrounding circumferentially the second layer and providing a continuous skin enclosing the second layer; (c) an outer conductor disposed circumferentially about the dielectric system; and (d) an outer protective layer surrounding circumferentially the outer conductor.
Claim 3
Dependent Claim
32 words
A coaxial cable of claim 1 in which the second layer of polymeric film of the dielectric system is applied in the form of a tape helically wrapped about said first layer.
Claim 4
Dependent Claim
18 words
A coaxial cable of claim 2 in which the second layer of polymeric film is polyparabanic acid film.
Claim 5
Dependent Claim
18 words
A coaxial cable of claim 2 in which the second layer of polymeric film is a polyimide film.
Claim 6
Dependent Claim
18 words
A coaxial cable of claim 2 in which the second layer of polymeric film is a polyester film.
Claim 7
Dependent Claim
18 words
A coaxial cable of claim 3 in which the third layer is a crosslinked polymer of methyl methacrylate.
Claim 8
Dependent Claim
18 words
A coaxial cable of claim 4 in which the third layer is a crosslinked polymer of methyl methacrylate.
Claim 9
Dependent Claim
18 words
A coaxial cable of claim 5 in which the third layer is a crosslinked polymer of methyl methacrylate.
Claim 10
Independent Claim
135 words
A method of making a coaxial cable having improved strength properties over a wide temperature range, comprising: (a) covering a metallic conductor circumferentially with a first layer of braided high tensile strength polymeric fluorocarbon filaments in an open weave along the length of the conductor, said filaments having a tensile strength of at least 40,000 psi and a dielectric constant of less than 2.8; (b) covering the first layer circumferentially with a second layer of a polymeric film thereby providing a continuous skin enclosing the first layer; and (c) covering the second layer circumferentially with a third layer consisting of a cross-linked polymeric lacquer thereby providing a continuous skin enclosing the second layer; (d) covering the third layer circumferentially with an outer conductor; and (e) covering the outer conductor circumferentially with an outer protective layer.
Claim 11
Independent Claim
135 words
A method of making a coaxial cable having improved strength properties over a wide temperature range, comprising: (a) covering a metallic conductor circumferentially with a first layer of braided high tensile strength polymeric fluorocarbon filaments in an open weave along the length of the conductor, said filaments having a tensile strength of at least 40,000 psi and a dielectric constant of less than 2.8; (b) covering the first layer circumferentially with a second layer of a polymeric film thereby providing a continuous skin enclosing the first layer; and (c) covering the second layer circumferentially with a third layer consisting of a cross-linked polymeric lacquer thereby providing a continuous skin enclosing the second layer; (d) covering the third layer circumferentially with an outer conductor; and (e) covering the outer conductor circumferentially with an outer protective layer.
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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) | 1987-04-03 | 1987-10-03 | 1988-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-04-03 | 1991-10-03 | 1992-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-04-03 | 1995-10-03 | 1996-04-03 | $7700.00 | Window Closed / Lapsed |