Patent US4340773A successfully refreshed from Google Patents.
US4340773A
Expired / Lapsed
US
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Coaxial cables with foam dielectric
Assignee: Champlain Cable Corp
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Filing: 1980-06-13
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Granted: 1982-07-20
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Expires: 2000-06-13
Abstract
Abstract A dielectric system for coaxial electrical conductors is provided. The dielectric system separates an inner and an outer conductor and is composed of a first layer of cellular polyparabanic acid. This layer directly contacts and provides a continuous skin circumferentially surrounding the inner conductor along its length. A second layer, consisting of a crosslinkable polymeric lacquer which provides a continuous skin enclosing the first layer is also provided. The dielectric system is used in coax cables.
Inventors
- 👤 Aime J. Perreault
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:48
CPC Classifications
H; H01; H01B; H01B11/00; H01B11/18; H01B11/1834; H01B11/1839
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
81 words
A coaxial cable comprising: a. an inner conductor; b. a dielectric system surrounding said inner conductor, said dielectric system comprising: (i) a first layer of cellular polyparabanic acid providing a continuous skin directly contacting and surrounding said inner conductor along its length, and (ii) a second layer consisting of a crosslinkable polymeric lacquer providing a continuous skin enclosing the first layer; c. an outer conductor disposed circumferentially about the dielectric system; d. an outer protective layer surrounding circumferentially the outer conductor.
Claim 2
Dependent Claim
81 words
A coaxial cable comprising: a. an inner conductor; b. a dielectric system surrounding said inner conductor, said dielectric system comprising: (i) a first layer of cellular polyparabanic acid providing a continuous skin directly contacting and surrounding said inner conductor along its length, and (ii) a second layer consisting of a crosslinkable polymeric lacquer providing a continuous skin enclosing the first layer; c. an outer conductor disposed circumferentially about the dielectric system; d. an outer protective layer surrounding circumferentially the outer conductor.
Claim 3
Dependent Claim
28 words
The coaxial cable of claim 1 in which the first layer of cellular polyparabanic acid is in the form of a continuous tape wrapped about the inner conductor.
Claim 4
Dependent Claim
34 words
The coaxial cable of claim 2 in which the tape is wrapped about the inner conductor in an overlapping arrangement such that approximately 25% of the tape of one layer overlaps an adjacent layer.
References Cited (Backward Citations)
US455904A
Cited
US3193426A
Cited
US3309458A
Cited
US3573976A
Cited
US3591562A
Cited
US3681515A
Cited
US3745232A
Cited
US3968463A
Cited
US4107354A
Cited
US4161564A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-07-19 | 1986-01-18 | 1986-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-07-19 | 1990-01-18 | 1990-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-07-19 | 1994-01-18 | 1994-07-20 | $7700.00 | Window Closed / Lapsed |