US4361508A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cable filler compositions comprising a mixture of (a) styrene block copolymer, (b) crystalline polypropylene copolymer and (c) mineral oil
Assignee: Atlantic Richfield Co
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Filing: 1980-10-20
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Granted: 1982-11-30
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Expires: 2000-10-20
Abstract
Abstract A cable filler composition comprises a mixture of mineral oil, a styrene-ethylene butylene-stryene block copolymer, and about 2-6 percent by weight of a thermoplastic polymer comprising an isotactic, crystalline polypropylene copolymer containing 0.1-4% by weight of an olefinic comonomer, the copolymer having a molecular weight of between 20,000 and 40,000.
Inventors
- 👤 Larry G. Bourland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:31
CPC Classifications
H; H01; H01B; H01B7/00; H01B7/17; H01B7/28; H01B7/282; H01B7/285; C; C08; C08L; C08L53/00; C08L53/02; C08L53/025; Y; Y02; Y02A; Y02A30/00; Y02A30/14
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
69 words
In a cable filling composition for use in waterproofing electrical cables wherein a thermoplastic polymer is admixed with a styrene-ethylene butylene-styrene block copolymer and mineral oil in an amount of 87-91 percent by weight of said composition, the improvement wherein said thermoplastic polymer comprises an isotactic, crystalline polypropylene copolymer containing 0.1-4% by weight of an olefinic comonomer, said copolymer having an average molecular weight of between 20,000 and 40,000.
Claim 2
Dependent Claim
69 words
In a cable filling composition for use in waterproofing electrical cables wherein a thermoplastic polymer is admixed with a styrene-ethylene butylene-styrene block copolymer and mineral oil in an amount of 87-91 percent by weight of said composition, the improvement wherein said thermoplastic polymer comprises an isotactic, crystalline polypropylene copolymer containing 0.1-4% by weight of an olefinic comonomer, said copolymer having an average molecular weight of between 20,000 and 40,000.
Claim 3
Dependent Claim
37 words
In a cable filling composition for use in waterproofing electrical cables as defined in claim 1, the improvement wherein said styrene-ethylene butylene-styrene block copolymer is present in an amount of 5-7 percent by weight of said compositions.
Claim 4
Dependent Claim
37 words
In a cable filling composition for use in waterproofing electrical cables as defined in claim 1, the improvement wherein said isotactic, crystalline polypropylene copolymer is present in an amount of 2-6 percent by weight of said compositions.
Claim 5
Dependent Claim
64 words
In a cable filling composition for use in waterproofing electrical cables as defined in claim 1, the improvement wherein said comonomer is of the general formula: CH.sub.2 ═CRR' wherein R is a member selected from the group consisting of hydrogen and aromatic and aliphatic hydrogen groups containing 2-20 carbon atoms, and R' is a member selected from the group consisting of hydrogen and methyl.
Claim 6
Dependent Claim
24 words
In a cable filling composition for use in waterproofing electrical cables as defined in claim 1, the improvement wherein said olefinic comonomer is ethylene.
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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) | 1985-11-29 | 1986-05-31 | 1986-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-11-29 | 1990-05-31 | 1990-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-11-29 | 1994-05-31 | 1994-11-30 | $7700.00 | Window Closed / Lapsed |