Appeal No. 1999-1073
Application No. 08/819,239
Claim 1 is representative of the subject matter on appeal
and reads as follows:
1. A nonflammable halogen-free mixture for manufacturing
electrical cables with increased heat resistance, the mixture
comprising:
a copolymer selected from the group of copolymers
consisting of a polypropylene block copolymer and a
polypropylene random block copolymer;
a salt of a metal selected from the group consisting of
Group II, IIa and IIb metals of the periodic system, wherein the
metal salt in the mixture is in the range of 1 to 15 parts per
100 parts of copolymer;
a metal hydroxide, wherein the metal hydroxide in the
mixture is in the range of 30 to 180 parts of copolymer; and
a silicone material selected from the group consisting of
silicone oil, silicone rubber, and combinations thereof, wherein
the silicon material in the mixture is in the range of 0.3 to 20
parts per 100 parts copolymer.
The prior art references relied upon by the examiner are:
Harbourne et al. (Harbourne) 4,722,858 Feb. 2,
1988
Dokurno et al. (Dokurno) 4,847,317 Jul. 11,
1989
Keogh 5,104,920 Apr. 14, 1992
Jow et al. (Jow) 5,482,990 Jan. 9, 1996
(Filed Jan. 17, 1995)
The appealed claims stand rejected as follows:
1) Claims 1, 3 through 7 and 16 under 35 U.S.C. § 103 as
unpatentable over Keogh; and
2
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