Patent US3697670A successfully refreshed from Google Patents.
US3697670A
Expired / Lapsed
US
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Electrical cable having sheath layers bonded with adhesive
Assignee: Phillips Petroleum Co
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Filing: 1971-12-02
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Granted: 1972-10-10
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Expires: 1991-12-02
Abstract
Abstract In an electrical cable having at least one polyolefin sheath layer and an aluminum sheath layer, the polyolefin layer is bonded to the aluminum layer with an adhesive material of 50 to 90 weight percent amorphous polypropylene and 50 to 10 weight percent mineral lubricating oil.
Inventors
- 👤 Bill Mitacek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:46
CPC Classifications
H; H01; H01B; H01B7/00; H01B7/17; H01B7/28; H01B7/282; H01B7/2825
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
50 words
An electrical cable in accordance with claim 1 wherein a second annular layer of a polymer of at least one mono-1-olefin is coaxial with said core and positioned between said core and said aluminum sheath and is bonded to said aluminum sheath by a second layer of said adhesive material.
Claim 2
Dependent Claim
16 words
An electrical cable in accordance with claim 2 wherein said adhesive material further comprises an antioxidant.
Claim 3
Dependent Claim
43 words
An electrical cable in accordance with claim 2 wherein Said adhesive material is about 60 to about 80 weight percent amorphous polypropylene and about 0.05 to about 2 weight percent of at least one antioxidant with the remainder being said mineral lubricating oil.
Claim 4
Dependent Claim
46 words
An electrical cable in accordance with claim 4 wherein said amorphous polypropylene has a molecular weight in the range of about 700 to about 100,000, as determined by light scattering and a density in the range of about 0.83 to about 0.90 gm/cc at 25* C.
Claim 5
Dependent Claim
29 words
An electrical cable in accordance with claim 5 wherein said mineral lubricating oil has a viscosity in the range of about 40 to about 150 SUS at 210* F.
Claim 6
Dependent Claim
34 words
An electrical cable in accordance with claim 6 wherein said adhesive material comprises about 75 weight percent amorphous polypropylene, about 25 weight percent mineral lubricating oil, and about 0.2 weight percent of an antioxidant.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-10-10 | 1976-04-10 | 1976-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-10 | 1980-04-10 | 1980-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-10 | 1984-04-10 | 1984-10-10 | $7700.00 | Window Closed / Lapsed |