How does the concept of structural obviousness apply to complex mixtures like zeolites?
The application of structural obviousness to complex mixtures like zeolites can be challenging and requires careful consideration. MPEP 2144.02 provides an important example:
“The Court held that different crystal forms of zeolites would not have been structurally obvious one from the other because there was no chemical theory supporting such a conclusion. The known chemical relationship between structurally similar compounds (homologs, analogs, isomers) did not support a finding of prima facie obviousness of claimed zeolite over the prior art because a zeolite is not a compound but a mixture of compounds related to each other by a particular crystal structure.”
This example illustrates that the usual rules of structural obviousness that apply to similar compounds may not be applicable to complex mixtures like zeolites. Each case must be evaluated based on the specific scientific principles relevant to the structure and properties of the mixture in question.
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