Patents > Search Collections > MPEP > 801 Introduction - 800 Restriction in Applications Filed Under 35 U.S.C. 111; Double Patenting

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801 Introduction - 800 Restriction in Applications Filed Under 35 U.S.C. 111; Double Patenting

801 Introduction

This chapter is limited to a discussion of the subject of restriction and double patenting under Title 35 of the United States Code and Title 37 of the Code of Federal Regulations as it relates to national applications filed under 35 U.S.C. 111(a). The discussion of unity of invention under the Patent Cooperation Treaty Articles and Rules as it is applied as an International Searching Authority, International Preliminary Examining Authority, and in applications entering the National Stage under 35 U.S.C. 371 as a Designated or Elected Office in the U.S. Patent and Trademark Office is covered in Chapter 1800.

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