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US4969706A
Expired / Lapsed
US
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Plenum cable which includes halogenated and non-halogenated plastic materials
Assignee: Commscope Inc of North Carolina
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Filing: 1989-04-25
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Granted: 1990-11-13
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Expires: 2009-04-25
Abstract
Abstract A plenum cable (20) includes a core (22) comprising at least one transmission medium such as a metallic conductor. The metallic conductor is insulated with a layer (27) of a plastic composition of material which includes a non-halogenated constituent such as, for example, a polyetherimide. Covering the insulated metallic conductor is a jacket (39) comprising a halogenated material such as a fluoropolymer. The cable exhibits excellent flame retardant properties as well as acceptable levels of corrosion and toxicity.
Inventors
- 👤 Tommy G. Hardin
- 👤 Behrooz A. Khorramian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 03:07
CPC Classifications
H; H01; H01B; H01B3/00; H01B3/18; H01B3/20; H01B3/24; G; G02; G02B; G02B6/00; G02B6/44; G02B6/4401; G02B6/4429; G02B6/4436; H01B7/00; H01B7/17; H01B7/29; H01B7/295
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
84 words
A communications cable, which comprises: a core which comprises at least one transmission medium: a non-halogenated plastic material which encloses said at least one transmission medium, said plastic material which encloses said at least one transmission medium being a composition which includes a constituent which is selected from the group consisting of a polyetherimide, a silicone-polyimide copolymer, and compositions which include a polyetherimide and a silicone-polyimide copolymer; and a jacket which encloses said at least one transmission medium and which comprises a halogenated material.
Claim 2
Dependent Claim
84 words
A communications cable, which comprises: a core which comprises at least one transmission medium: a non-halogenated plastic material which encloses said at least one transmission medium, said plastic material which encloses said at least one transmission medium being a composition which includes a constituent which is selected from the group consisting of a polyetherimide, a silicone-polyimide copolymer, and compositions which include a polyetherimide and a silicone-polyimide copolymer; and a jacket which encloses said at least one transmission medium and which comprises a halogenated material.
Claim 3
Dependent Claim
12 words
The cable of claim 1, wherein said jacket comprises a fluoropolymer material.
Claim 4
Dependent Claim
18 words
The cable of claim 1, wherein said jacket comprises a composition which includes a copolymer of ethylene chlorotrifluoroethylene.
Claim 5
Dependent Claim
16 words
The cable of claim 3, wherein said jacket comprises a composition which also includes a stabilizer.
Claim 6
Dependent Claim
14 words
The cable of claim 1, wherein said jacket comprises a polyvinylidene fluoride plastic material.
Claim 7
Dependent Claim
13 words
The cable of claim 1, wherein said jacket comprises a hexofluoropropylene plastic material.
Claim 8
Dependent Claim
21 words
The cable of claim 1, wherein said cable includes a thermal barrier which is disposed between said core and said jacket.
Claim 9
Dependent Claim
40 words
The cable of claim 7, wherein said thermal barrier is a laminate which includes a plastic material which is selected from the group consisting of a polyetherimide, a silicone polyimide copolymer, and blends of a polyetherimide and a silicone-polyimide copolymer.
Claim 10
Dependent Claim
32 words
The cable of claim 1, wherein said plastic material which encloses said at least one transmission medium has a wall thickness which is in the range of about 0.005 to 0.007 inch.
Claim 11
Dependent Claim
13 words
The cable of claim 1, wherein said transmission medium comprises a metallic conductor.
Claim 12
Dependent Claim
13 words
The cable of claim 10, wherein said metallic conductor is made of copper.
Claim 13
Dependent Claim
14 words
The cable of claim 1, which includes a plurality of optical fiber transmission media.
Claim 14
Dependent Claim
23 words
The cable of claim 12, wherein each said optical fiber transmission medium is enclosed in a layer of a silicone-based copolymer plastic material.
Claim 15
Dependent Claim
39 words
The cable of claim 13, wherein said plurality of optical fiber transmission media are arrayed about a tube which encloses a central organizing member and wherein a plurality of strength members are disposed between said media and said jacket.
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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) | 1993-11-12 | 1994-05-14 | 1994-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-11-12 | 1998-05-14 | 1998-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-11-12 | 2002-05-14 | 2002-11-13 | $7700.00 | Window Closed / Lapsed |