2103 Patent Examination Process [R-08.2017]（USPTO）
C. Review the Claims
Examiners should begin claim analysis byidentifying and evaluating each claim limitation. For processes, the claimlimitations will define steps or acts to be performed. For products, the claimlimitations will define discrete physical structures or materials. Product claimsare claims that are directed to either machines, manufactures or compositionsof matter.