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Wherein clauses are limiting on their face, more so if the specification and prosecution history support that they are material to patentability

Multiple components from the prior art cannot be pieced together to provide the structure and function of one claim recitation

I see this a fair amount, and actually just prepared a response last week where the Examiner had so construed a reference, and so this decision caught my eye. In Ex parte de Ceuster, the Examiner had combined two components of the prior art, a masking layer 2 and insulating layer 20, in order to […]