This page is an FAQ based on guidance from the Manual of Patent Examining Procedure. It is provided as guidance, with links to the ground truth sources. This is information only: it is not legal advice.
Yes, a dependent claim can refer to more than one preceding claim in a patent application, but there are specific rules governing such references. According to MPEP 608.01(n):
‘A claim which depends from a dependent claim should not be separated by any claim which does not also depend from said dependent claim. It should be kept in mind that a dependent claim may refer to any preceding independent claim. In general, applicant’s sequence will not be changed.’
Key points to remember:
- A dependent claim can refer to multiple preceding claims, but only in the alternative (using ‘or’).
- Multiple dependent claims must be carefully constructed to avoid improper dependencies.
- The order of claims should be maintained to ensure clarity and proper dependency structure.
Proper referencing in dependent claims helps maintain a clear and logical claim structure in the patent application.