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Manual of Patent Examining Procedure (MPEP)
Chapter 0800
Restriction in Applications Filed Under 35 U.S.C. 111; Double Patenting
United States Patent and Trademark Office
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801
Introduction
802
Basis for Restriction Practice in Statute and Rules
803
Restriction — When Proper
804
Definition of Double Patenting
805
Effect of Improper Joinder in Patent
806
Determination of Distinctness or Independence of Claimed Inventions
807
Patentability Report Practice Has No Effect on Restriction Practice
808
Reasons for Insisting Upon Restriction
809
Linking Claims
810
Action on the Merits
811
Time for Making Requirement
812
Who Should Make the Requirement
813
[Reserved]
814
Indicate Exactly How Application Is To Be Restricted
815
Make Requirement Complete
816
[Reserved]
817
Outline of Letter for Restriction Requirement
818
Election and Reply
819
Office Generally Does Not Permit Shift
820
[Reserved]
821
Treatment of Claims Held To Be Drawn to Nonelected Inventions
822
Claims to Inventions That Are Not Patentably Distinct in Plural Applications of Same Applicant or Assignee
823
Unity of Invention Under the Patent Cooperation Treaty