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Patent US3614299A successfully refreshed from Google Patents.
US3614299A
Expired / Lapsed
US
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Low thermal conductivity cable core wrap
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1970-07-17
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Granted: 1971-10-19
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Expires: 1990-07-17
Abstract
Abstract A thermally insulating laminate as a cable core wrap wherein the laminate consists of a at least one layer of a low bulk density, high-surface area material capable of intertrapping air in said laminate to lower thermal conductivity.
Inventors
- 👤 Thomas J Grail
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 12:48
CPC Classifications
H; H01; H01B; H01B7/00; H01B7/17; H01B7/29
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
129 words
An electrical cable comprising: a. multiple strands of conductors, said conductors individually insulated electrically from one another; b. said multiple strands wrapped with a composite laminate comprising a film of flexible dielectric material, said film having an inner surface contiguous wIth said multiple strands, and an outer surface; c. said outer surface of said film bonded to a porous nonwoven material having a maximum bulk density of one-half of the material from which it is formed; d. said dielectric material having a maximum dielectric constant of 3.5 measured at room temperature and 1 kc., and a dissipation factor in the range of 0.02 to 1.5 percent; e. a corrugated aluminum shield disposed circumferentially about said composite laminate; and f. a polyolefin insulating cover disposed externally of said aluminum shield.
Claim 2
Dependent Claim
129 words
An electrical cable comprising: a. multiple strands of conductors, said conductors individually insulated electrically from one another; b. said multiple strands wrapped with a composite laminate comprising a film of flexible dielectric material, said film having an inner surface contiguous wIth said multiple strands, and an outer surface; c. said outer surface of said film bonded to a porous nonwoven material having a maximum bulk density of one-half of the material from which it is formed; d. said dielectric material having a maximum dielectric constant of 3.5 measured at room temperature and 1 kc., and a dissipation factor in the range of 0.02 to 1.5 percent; e. a corrugated aluminum shield disposed circumferentially about said composite laminate; and f. a polyolefin insulating cover disposed externally of said aluminum shield.
Claim 3
Dependent Claim
47 words
An electrical cable according to claim 1 wherein said dielectric material is polypropylene having a thickness of 5 mils, said porous nonwoven material is a polyester mat weighing 1.5 ounces per square yard and said polyolefin insulating cover is polyethylene having a thickness of about 70 mils.
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) | 1974-10-18 | 1975-04-19 | 1975-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-18 | 1979-04-19 | 1979-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-18 | 1983-04-19 | 1983-10-19 | $7700.00 | Window Closed / Lapsed |