The reason for rejecting the patent may be that the patent applied by the applicant is not novel, unrealizable or duplicated with the existing technology. In addition, the rejection may also involve technical issues, and the examiner or the Committee will think that the applicant cannot prove that its innovation is obviously different from others' technology.
After receiving the notice of patent rejection, the applicant can choose: abandon the patent application, in which case the application is deemed to be withdrawn; Objections to the above issues and decisions; Make modifications and improvements and resubmit the application. When choosing any method, you should choose an experienced intellectual property lawyer to help you to ensure the best result.