US3971882A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical cable having an outer sheath with improved pyrolysis properties
Assignee: Okonite Co
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Filing: 1974-02-14
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Granted: 1976-07-27
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Expires: 1994-02-14
Abstract
Abstract In combination in an electric cable, at least one conductor, an essentially smokeless insulating jacket enclosing said conductor, the jacket consisting essentially of a chlorosulfonated polyethylene having uniformly dispersed therethrough an amount of magnesium oxide at least sufficient to suppress substantial cable jacket smoking when the cable is subjected to pyrolysis.
Inventors
- 👤 Dominic A. Alia
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:47
CPC Classifications
H; H01; H01B; H01B3/00; H01B3/18; H01B3/30; H01B3/44; H01B3/441; C; C08; C08K; C08K3/00; C08K3/18; C08K3/20; C08K3/22; C08L; C08L23/00; C08L23/26; C08L23/32; C08L23/34
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
80 words
In combination in an electrical cable, at least one conductor, an essentially smokeless insulating jacket enclosing said conductor, said jacket consisting essentially of approximately 40% by weight chloro-sulfonated polyethylene, approximately 10% by weight chlorinated polyethylene, approximately 23.75% by weight clay, approximately 10% by weight carbon black, approximately 5% by weight magnesium oxide, approximately 0.5% by weight stearic acid, approximately 7.5% by weight tri-cresyl phosphate, approximately 2% by weight paraffin, approximately 0.25% by weight sulfur and approximately 1.0% by weight tetramethylthiuram-disulfide.
Claim 2
Dependent Claim
80 words
In combination in an electrical cable, at least one conductor, an essentially smokeless insulating jacket enclosing said conductor, said jacket consisting essentially of approximately 40% by weight chloro-sulfonated polyethylene, approximately 10% by weight chlorinated polyethylene, approximately 23.75% by weight clay, approximately 10% by weight carbon black, approximately 5% by weight magnesium oxide, approximately 0.5% by weight stearic acid, approximately 7.5% by weight tri-cresyl phosphate, approximately 2% by weight paraffin, approximately 0.25% by weight sulfur and approximately 1.0% by weight tetramethylthiuram-disulfide.
Claim 3
Dependent Claim
55 words
In combination in an electrical cable, at least one conductor, an essentially smokeless insulating jacket enclosing said conductor, said jacket consisting essentially of chloro-sulfonated polyethylene and chlorinated polyethylene having uniformly dispersed therethrough at least about 2.5% by weight of magnesium oxide effective to impart an intumescence property to said composition when subjected to elevated temperatures.
Claim 4
Dependent Claim
55 words
In combination in an electrical cable, at least one conductor, an essentially smokeless insulating jacket enclosing said conductor, said jacket consisting essentially of chloro-sulfonated polyethylene and chlorinated polyethylene having uniformly dispersed therethrough at least about 2.5% by weight of magnesium oxide effective to impart an intumescence property to said composition when subjected to elevated temperatures.
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) | 1979-07-27 | 1980-01-26 | 1980-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-07-27 | 1984-01-26 | 1984-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-07-27 | 1988-01-26 | 1988-07-27 | $7700.00 | Window Closed / Lapsed |