US3733427A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Waterproof electrical cable
Assignee: Union Carbide Canada Ltd
•
Filing: 1972-05-11
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Granted: 1973-05-15
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Expires: 1992-05-11
Abstract
Abstract A cable filling composition comprising polybutene, microcrystalline wax, polyethylene and an antioxidant is disclosed which exhibits desirable electrical performance while having good handling characteristics and compatability with polyethylene cable insulation. The composition prevents water ingress in a telephone cable.
Inventors
- 👤 M Clark
- 👤 S Bhatty
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:37
CPC Classifications
H; H01; H01B; H01B3/00; H01B3/18; H01B3/30; H01B3/44; H01B7/00; H01B7/17; H01B7/28; H01B7/282; H01B7/285
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
42 words
A composition as claimed in claim 1 wherein the polybutene has a number average molecular weight of at least 400, a specific gravity of from 0.860 to 0.920 at 20* C and a viscosity of at least 10 centistokes at 210* F.
Claim 2
Dependent Claim
45 words
A composition as claimed in claim 2 wherein the microcrystalline wax has a drop melting point of from 155* F to 165* F, a congealing point of from 145* F to 155* F and a specific gravity at 73* F of from 0.916 to 0.920.
Claim 3
Dependent Claim
22 words
A composition as claimed in claim 3 wherein the antioxidant is one selected from the group consisting of 2,2''-thio-bis(4-methyl-6-butyl-phenol) and 2,6-di-t-butyl-4-methyl phenol.
Claim 4
Dependent Claim
126 words
A filling composition for use in insulated electrical type cable having a polyethylene insulated core, said composition consisting essentially of from 50 percent to 95 percent by weight of polybutene having a number average molecular weight of at least 500 and a viscosity at 210* F of from 13 to 18 centistokes, from 4 percent to 49 percent by weight of a microcrystalline wax having a viscosity at 210* F of from 13 to 18 centistokes, from 0.2 percent to 0.8 percent by weight of polyethylene having a melting point of at least 90* C, and 0.2 percent to 0.8 percent by weight of polyethylene having a melting point of at least 90* C, and 0.2 percent to 0.8 percent by weight of a suitable antioxidant.
Claim 5
Dependent Claim
37 words
A composition as claimed in claim 5 wherein from 65 percent to 85 percent by weight of said polybutene and from 15 percent to 35 percent by weight of said microcrystalline wax is present in the composition.
Claim 6
Dependent Claim
57 words
A composition as claimed in claim 6 wherein the polybutene has a specific gravity of from 0.860 to 0.920 at 20* C and the microcrystalline wax has a drop melting point of from 155* F to 165* F a congealing point of from 145* F to 155* F and a specific gravity of from 0.916 to 0.920.
Claim 7
Dependent Claim
23 words
A composition as claimed in claim 7 wherein the antioxidant is one selected from the group consisting of 2,2''-thio-bis(4-methyl-6-butyl phenol) and 2,6-di-t-butyl-4-methyl phenol.
Claim 8
Dependent Claim
97 words
An insulated electrical cable containing a filling composition consisting essentially of from 10 percent to 98 percent by weight of polybutene having a number average molecular weight of at least 400 and a viscosity at 210* F of at least 10 centistokes, from 1 percent to 75 percent by weight of microcrystalline wax having a viscosity at 210* F of from 10 to 30 centistokes, from 0.1 percent to 10 percent by weight of polyethylene having a melting point of at least 90* C and from 0.02 percent to 0.8 percent by weight of a suitable antioxidant.
Claim 9
Dependent Claim
74 words
An insulated electrical cable containing a filling composition consisting essentially of from 50 percent to 95 percent by weight of polybutene having a number average molecular weight of at least 500 and a viscosity at 210* F of from 13 to 18 centistokes, from 0.2 percent to 0.8 percent by weight of polyethylene having a melting point of at least 90* C and 0.2 percent to 0.8 percent by weight of a suitable antioxidant.
Claim 10
Dependent Claim
26 words
An insulated electrical cable as claimed in claim 10 wherein the antioxidant is one selected from the group consisting of 2,2-thio-bis (4-methyl-6-butyl phenol) and 2,6-di-t-butyl-4-methyl phenol.
References Cited (Backward Citations)
US3642638A
Cited
US3607487A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-05-14 | 1976-11-13 | 1977-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-14 | 1980-11-13 | 1981-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-14 | 1984-11-13 | 1985-05-15 | $7700.00 | Window Closed / Lapsed |