Appeal No. 95-4203
Application 07/793,889
Bauer teaches epoxy mixture photopolymerizable compositions containing
products of epichlorohydrin and bisphenol A, photinitiator, and other conventional
additives. Bauer’s epoxy resin has a molecular weight of 20,000 to 60,000 (column 1, line
59). This molecular weight touches the claimed range of between 60,000 to about
130,000. Bauer also teaches the use of brominated epoxies at column, 2, lines 43-47
(see also Example 4 at column 7). Bauer does not teach the use of a cationic
photoinitiator. Crivello teaches an epoxy photopolymerizable compositions containing
products of epichlorhydrin and bisphenol A are polymerized with cationic photoinitiators. It
is the examiner’s position that one of ordinary skill in this art would have found it obvious to
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cationically cure the Bauer epoxy resin mixture with a reasonable expectation of success.
We agree.
Appellants argue that Bauer is deficient because he lacks a teaching to use
a cationic photoinitiator for his epoxy resin system, he includes free radical initiator in his
system and he employs a epoxy resin having a molecular wight of 20,000 -60,000.
Appellants also argue That Crivello dose not teach combining specific epoxy resins of the
claimed invention with the Crivello photoinitiator. Lastly, they argue that there is no
suggestion to combine Crivello’s cationic photinitiator with Bauer’s free radical
polymerization system. We do not find appellants’ argument persuasive. Initially we note
3 A discussion of Santorelli is not necessary of our decision.
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