Patent US4361508A successfully refreshed from Google Patents.
US4361508A
Expired / Lapsed
US
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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 14:29
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.
References Cited (Backward Citations)
US3478128A
Cited
US3830953A
Cited
US3865776A
Cited
US3879575A
Cited
US4132698A
Cited
US4136699A
Cited
US4076659A
Cited
US4032492A
Cited
GB1532350A
Cited
US4105619A
Cited
GB2001657B
Cited
US4220579A
Cited
US4198983A
Cited
US4176240A
Cited
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 |