US4941729A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Building cables which include non-halogenated plastic materials
Assignee: Commscope Inc of North Carolina
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Filing: 1989-01-27
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Granted: 1990-07-17
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Expires: 2009-01-27
Abstract
Abstract A cable which may be used in buildings in concealed areas such as in plenums or in riser shafts includes a core (22) which includes at least one transmission medium which is enclosed in a non-halogenated plastic material. The core is enclosed with a jacket (28) which also is made of a non-halogenated plastic material. The non-halogenated material which encloses the transmission medium and the jacket is a plastic material selected from the group consisting of a filled polyolefin, a polyetherimide and a silicone-polyimide copolymer, and blend compositions of a polyetherimide and a silicone-polyimide copolymer. Interposed between the core and the jacket is a thermal barrier which includes a plastic film which is selected from the group consisting of a polyetherimide, a silicone-polyimide copolymer, a polyimide, and blend compositions of a polyetherimide and a silicone-polyimide copolymer.
Inventors
- 👤 Tommy G. Hardin
- 👤 Behrooz A. Khorramian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:02
CPC Classifications
H; H01; H01B; H01B7/00; H01B7/17; H01B7/29; H01B7/292; G; G02; G02B; G02B6/00; G02B6/44; G02B6/4401; G02B6/4429; G02B6/443; G02B6/4436; G02B6/46; G02B6/47; G02B6/475; H01B7/295
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
152 words
A communication cable, which comprises: a core which comprises at least one transmission medium; a plastic material which encloses said at least one transmission medium; a jacket which comprises a plastic material and which encloses said at least one transmission medium; said plastic material which encloses said at least one transmission medium and said plastic material of said jacket each including a plastic material which is selected from the group consisting of a filled polyolefin, a polyetherimide, a silicone-polyimide copolymer, and blend compositions of a polyetherimide and a silicone-polyimide copolymer; and a thermal barrier which is disposed between said at least one transmission medium and said jacket, said thermal barrier being a laminate comprising a layer of a metallic material and a layer of a plastic material which is selected from the group consisting of a polyetherimide, a silicone-polyimide copolymer, a polyimide, and blend compositions of a polyetherimide and a silicone-polyimide copolymer.
Claim 2
Dependent Claim
152 words
A communication cable, which comprises: a core which comprises at least one transmission medium; a plastic material which encloses said at least one transmission medium; a jacket which comprises a plastic material and which encloses said at least one transmission medium; said plastic material which encloses said at least one transmission medium and said plastic material of said jacket each including a plastic material which is selected from the group consisting of a filled polyolefin, a polyetherimide, a silicone-polyimide copolymer, and blend compositions of a polyetherimide and a silicone-polyimide copolymer; and a thermal barrier which is disposed between said at least one transmission medium and said jacket, said thermal barrier being a laminate comprising a layer of a metallic material and a layer of a plastic material which is selected from the group consisting of a polyetherimide, a silicone-polyimide copolymer, a polyimide, and blend compositions of a polyetherimide and a silicone-polyimide copolymer.
Claim 3
Dependent Claim
44 words
The cable of claim 1, wherein said filled polyolefin is a composition which comprises a polyolefin plastic material and a filler which is selected from the group consisting of antimony trixoide, a metal hydroxide, and blend compositions of antimony trioxide and a metal hydroxide.
Claim 4
Dependent Claim
21 words
The cable of claim 2, wherein said filler comprises antimony trixoide which comprises five percent by weight of said filled polyolefin.
Claim 5
Dependent Claim
25 words
The cable of claim 2, wherein said filler comprises a metal hydroxide which comprises about 20 to about 70% by weight of said filled polyolefin.
Claim 6
Dependent Claim
11 words
The cable of claim 2, wherein said filler includes aluminum hydroxide.
Claim 7
Dependent Claim
11 words
The cable of claim 2, wherein said filler includes magnesium hydroxide.
Claim 8
Dependent Claim
15 words
The cable of claim 1, wherein said metallic material of said thermal barrier faces outwardly.
Claim 9
Dependent Claim
25 words
The cable of claim 7, wherein said metallic material of the laminated thermal barrier has an emissivity in the range of about 0.039 to 0.057.
Claim 10
Dependent Claim
16 words
The cable of claim 7, wherein said metallic material of the laminated thermal barrier is aluminum.
Claim 11
Dependent Claim
19 words
The cable of claim 7, wherein each layer of said thermal barrier has a thickness of about 0.001 inch.
Claim 12
Dependent Claim
19 words
The cable of claim 1, wherein said cable also includes a binder which is wrapped about said thermal barrier.
Claim 13
Dependent Claim
12 words
The cable of claim 11, wherein said binder comprises a fiberglass material.
Claim 14
Dependent Claim
13 words
The cable of claim 11, wherein said binder comprises an aramid yarn material.
Claim 15
Dependent Claim
20 words
The cable of claim 1, wherein said thermal barrier is wrapped about said core to include a longitudinal overlapped seam.
Claim 16
Dependent Claim
15 words
The cable of claim 1, wherein said thermal barrier is wrapped helically about said core.
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) | 1993-07-16 | 1994-01-15 | 1994-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-07-16 | 1998-01-15 | 1998-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-07-16 | 2002-01-15 | 2002-07-17 | $7700.00 | Window Closed / Lapsed |