How does the MPEP distinguish between compounds and mixtures in terms of obviousness?

The Manual of Patent Examining Procedure (MPEP) makes an important distinction between compounds and mixtures when considering obviousness. MPEP 2144.02 states: “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…

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