Appeal 2007-0951
Application 10/740,074
Appellants’ invention relates to a method for reducing haze in a fire
resistant polycarbonate composition. Independent claim 24 is illustrative of
the invention:
24. A method for reducing haze in fire resistant polycarbonate
compositions, comprising:
blending a flame retardant salt with a first polycarbonate to form a
concentrate; and
blending the concentrate with a second polycarbonate and a cyclic
siloxane to form a fire resistant polycarbonate composition.
The Examiner relies on the following prior art references to show
unpatentability:
Mark US 4,130,530 Dec. 19, 1978
Ogoe (Ogoe ‘479) US 5,041,479 Aug. 20, 1991
Umeda US 5,449,710 Sep. 12, 1995
Ogoe (Ogoe ‘280) US 5,663,280 Sep. 2, 1997
Rosenquist US 6,353,046 B1 Mar. 5, 2002
The Examiner made the following rejection:
Claims 1-9 and 21-29 under 35 U.S.C § 103(a) as unpatentable over
Umeda in view of Rosenquist or Mark and further in view of Ogoe ‘280 or
Ogoe ‘479.
ISSUE
The Examiner contends that it would have been obvious to one of
ordinary skill in the art at the time of the invention to form a fire resistant
polycarbonate composition by separately blending components in the
manner claimed based on various advantages disclosed in the prior art.
Appellants contend that the Examiner’s rejection is based on hindsight and
the Examiner’s motivation to combine the applied prior art is not supported
2
Page: Previous 1 2 3 4 5 6 7 Next
Last modified: September 9, 2013