Appeal No. 95-3220
Application 08/112,986
substantially improved impact resistance and blending strength, while retaining the heat
resistance and fire retardancy for which polyarylene sulfide resins are known, and yet not
suffering from the adverse water absorption which characterizes nylons” (Brief, para.
bridging pp. 4-5).
The examiner primarily bases his conclusion of obviousness on the teachings of
Katto and Takekoshi. Katto discloses a polyarylene sulfide composition which comprises
an organic acid or an organic acid anhydride; e.g. a polycarboxylic acid having a benzene
ring, a carboxylic acid having a hydroxyl-substituted benzene ring, or an anhydride thereof.
Katto, col. 6, lines 64-69. Katto further discloses that “the composition resin of the
invention can be blended with compatible resin materials such as polyimides, polyamides,
polyetheretherketones,” etc. Katto, col. 8, lines 12-23. Takekoshi discloses a method of
preparing polyarylene sulfides with reactive functional groups such as amino groups.
According to Takekoshi, the compositions prepared using the method disclosed therein
are capable of reaction with anhydride-terminated polyetherimides to form block
copolymers. Takekoshi, col. 7, lines 9-14.
Alternatively, the examiner urges that the claimed invention would have been prima
facie obvious to one of ordinary skill in the art in view of the teachings of Katto and Suzuki,
an undated abstract which merely states that a polyarylene sulfide resin composition was
prepared by mixing polyphenylene sulfide with amino and amide groups and maleic
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