Appeal No. 1997-3036
Application No. 08/268,094
The Primary References
The Fekete Reference
Fekete discloses thermoset resin compositions having heat resistant polymers and
methods of making electrical laminates therefrom. In Fekete, the thermoset resin is a diacrylate
polymer formed from the reaction of a diglycidyl ether or polyglycidyl ether of Bisphenol-A with
two moles of a carboxylic acid selected from the class of acrylic, methacrylic and ethylacrylic
acid. (Fekete., col. 1, lines 45-59). According to Fekete the reaction between the polyglycidyl
ethers of Bisphenol-A and the carboxylic acid proceeds until substantially all of the epoxy groups
are eliminated. (Fekete, col. 1, line 66 to col. 2, line 5). As recognized by the examiner, Fekete
does not disclose appellants' claimed epoxy acrylate as the diacrylate of Fekete is a fully
acrylated Bisphenol-A epoxide with no pendant acrylate moieties. Teaching only the fully
acrylated diacrylates, Fekete could not have rendered obvious, appellants' claimed epoxy
acrylates.
The Takiyama Reference
Takiyama relates to a process for producing unsaturated ester resins where an epoxy resin
having at least one epoxy group in its molecular structure is heat reacted with an unsaturated
monobasic acid in the presence of a catalyst. (Takiyama, abstract). The epoxy compounds which
may be used include diglycidyl ethers such as bisphenol type epoxy resins and epoxy novalac
resins. (Takiyama., col. 3, lines 16-33). Suitable unsaturated monobasic acids include
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