Appeal No. 2001-0218 2
Application No. 09/184,993
THE INVENTION
The invention is directed to a polycarbonate sheet comprising a polycarbonate resin,
a phosphorous stabilizer and a processing release agent. The polycarbonate is limited to
those which have a limited melt volume ratio, (MVR). Additional limitations are provided
in the following illustrative claim.
THE CLAIM
Claim 1 is illustrative of appellants’ invention and is reproduced below:
1. A fire resistant polycarbonate sheet comprising:
a) branched polycarbonate resin having an MVR above 11 cm3/10
minutes, wherein MVR is measured at 300oC and 2.16 kg,
b) a phosphorous-based stabilizer, and
c) a processing release agent.
THE REFERENCES OF RECORD
As evidence of obviousness the examiner relies upon the following references:
Lee (Lee ‘251) 4,399,251 Aug. 16, 1983
Lee (Lee ‘351) 4,409,351 Oct. 11, 1983
Mark 4,415,696 Nov. 15, 1983
Lee (Lee ‘268) 4,446,268 May 1, 1984
Miller 4,554,302 Nov. 19, 1985
Miller et al. 4,626,566 Dec. 2, 1986
Ishiwa et al. (Ishiwa) 5,484,874 Jan. 16, 1996
Obayashi et al. (Obayashi) 5,807,914 Sep. 15, 1998
De Bont et al. (De Bont) 5,852,158 Dec. 22, 1998
Sakashita et al. (Sakashita) 5,606,007 Feb. 25, 1997
Barren et al. (Barren) 5,786,411 Jul. 28, 1998
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