Appeal No. 1999-2316
Application No. 08/640,262
Category 5 electrical requirements of TIA/EIA Standard 568A,
and that passes the flame spread and smoke generation
requirements of the UL-910 Steiner Tunnel Test.
Claim 39 is illustrative of the claimed invention, and it
reads as follows:
39. A communications cable for use in building
plenum applications, said cable comprising:
a core which comprises at least one transmission
medium, each of said at least one transmission medium
being enclosed by a primary insulation formed from
substantially pure high density polyethylene;
an outer jacket surrounding said core and formed
from a polyvinylidene fluoride (PVDF) composition; and
an intermediate material interposed between said
core and said outer jacket, said intermediate material
having high temperature stability and being configured to
electrically separate said core from said outer jacket;
wherein
said primary insulation, said outer jacket, and said
intermediate material are formed and cooperatively
configured such that said cable passes a standard plenum
cable burn test and said cable meets the Category 5
electrical requirements of TIA/EIA Standard 568A.
The references relied on by the examiner are:
Gerland et al. (Gerland) 3,516,859 Jun.
23, 1970
Nye 3,692,924 Sep. 19,
1972
Arroyo et al. (Arroyo) 4,605,818 Aug. 12,
1986
2
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