MPEP 1800 – Patent Cooperation Treaty

This page consolidates and annotates enforceable requirements under MPEP 1800 — Patent Cooperation Treaty, including statutory authority, regulatory rules, examiner guidance, and practice notes. It is provided as guidance, with links to the ground truth sources. This is information only, it is not legal advice.

Metric	Value	Share of total
Rules extracted	2,485	6.6%
Citations to Authorities	MPEP2,837 USC749 CFR1,801 PCT3,643	7.4%
Avg citations per rule	3.63
Topics covered	151 primary + 228 secondary	15.6%

Pages in this chapter

Page
MPEP § 1801 — Basic Patent Cooperation Treaty (PCT) Principles65 rules
MPEP § 1802 — PCT Definitions2 rules
MPEP § 1803 — Reservations Under the PCT Taken by, and Notifications of Incompatibility Made by, the United States of America12 rules
MPEP § 1805 — Where To File an International Application28 rules
MPEP § 1806 — Applicants and Inventors42 rules
MPEP § 1807 — Agent or Common Representative and General Power of Attorney32 rules
MPEP § 1808 — Change in or Revocation of the Appointment of an Agent or a Common Representative34 rules
MPEP § 1809 — Access to the USPTO patent electronic filing system14 rules
MPEP § 1810 — Filing Date Requirements39 rules
MPEP § 1812 — Elements of the International Application10 rules
MPEP § 1817 — PCT Member States2 rules
MPEP § 1819 — Earlier Search12 rules
MPEP § 1820 — Signature of Applicant28 rules
MPEP § 1821 — The Request56 rules
MPEP § 1823 — The Description22 rules
MPEP § 1823.01 — Reference to Deposited Biological Material45 rules
MPEP § 1823.02 — Filing Nucleotide and/or Amino Acid Sequence Listings in International Applications43 rules
MPEP § 1824 — The Claims49 rules
MPEP § 1825 — The Drawings67 rules
MPEP § 1826 — The Abstract30 rules
MPEP § 1827 — Fees5 rules
MPEP § 1827.01 — Refund of International Application Fees20 rules
MPEP § 1828 — Priority Claim and Document16 rules
MPEP § 1828.01 — Restoration of the Right of Priority20 rules
MPEP § 1828.02 — Continuation or Continuation-in-Part Indication in the Request9 rules
MPEP § 1830 — International Application Transmittal Letter2 rules
MPEP § 1832 — License Request for Foreign Filing Under the PCT12 rules
MPEP § 1834 — Correspondence25 rules
MPEP § 1834.01 — Filing of Correspondence by Facsimile12 rules
MPEP § 1834.02 — Irregularities in the Mail or Electronic Communications Service20 rules
MPEP § 1836 — Rectification of Obvious Mistakes33 rules
MPEP § 1840 — The International Searching Authority18 rules
MPEP § 1840.01 — The European Patent Office as an International Searching Authority0 rules
MPEP § 1840.02 — The Korean Intellectual Property Office as an International Searching Authority0 rules
MPEP § 1840.03 — The Australian Patent Office (IP Australia) as an International Searching Authority0 rules
MPEP § 1840.05 — The Israel Patent Office (ILPO) as an International Searching Authority0 rules
MPEP § 1840.06 — The Japan Patent Office (JPO) as an International Searching Authority0 rules
MPEP § 1840.07 — The Intellectual Property Office of Singapore (IPOS) as an International Searching Authority0 rules
MPEP § 1842 — Basic Flow Under the PCT20 rules
MPEP § 1843 — The International Search7 rules
MPEP § 1843.01 — Prior Art for Chapter I Processing45 rules
MPEP § 1843.02 — Certain Subject Matter Need Not Be Searched5 rules
MPEP § 1843.03 — No Search Required if Claims Are Unclear5 rules
MPEP § 1843.04 — Procedure for Claims Not Required To Be Searched and for Claims That Are Unclear6 rules
MPEP § 1843.05 — Time Limit for Establishing the International Search Report and the Written Opinion of the International Searching Authority8 rules
MPEP § 1844 — The International Search Report19 rules
MPEP § 1844.01 — Preparing the International Search Report (Form PCT/ISA/210)101 rules
MPEP § 1845 — Written Opinion of the International Searching Authority11 rules
MPEP § 1845.01 — Preparing the Written Opinion of the International Searching Authority (Form PCT/ISA/237)53 rules
MPEP § 1845.02 — Notification of Transmittal of the International Search Report and the Written Opinion of the International Searching Authority, or the Declaration (Form PCT/ISA/220)5 rules
MPEP § 1848 — Sequence Listings39 rules
MPEP § 1850 — Unity of Invention Before the International Searching Authority177 rules
MPEP § 1851 — Identification of Patent Documents17 rules
MPEP § 1852 — Taking Into Account Results of Earlier Search(es)14 rules
MPEP § 1853 — Amendment Under PCT Article 1957 rules
MPEP § 1856 — Supplementary International Searches71 rules
MPEP § 1857 — International Publication28 rules
MPEP § 1859 — Withdrawal of International Application, Designations, or Priority Claims34 rules
MPEP § 1860 — International Preliminary Examination Procedure13 rules
MPEP § 1862 — Agreement With the International Bureau To Serve as an International Preliminary Examining Authority9 rules
MPEP § 1864 — The Demand and Preparation for Filing of Demand14 rules
MPEP § 1864.01 — Amendments Filed Under PCT Article 3424 rules
MPEP § 1864.02 — Applicant’s Right To File a Demand13 rules
MPEP § 1864.03 — States Which May Be Elected4 rules
MPEP § 1864.04 — Agent’s Right To Act4 rules
MPEP § 1865 — Filing of Demand27 rules
MPEP § 1867 — Preliminary Examination Fees18 rules
MPEP § 1868 — Correction of Defects in the Demand14 rules
MPEP § 1869 — Notification to International Bureau of Demand1 rules
MPEP § 1870 — Priority Document and Translation Thereof5 rules
MPEP § 1871 — Processing Amendments Filed Under Article 19 and Article 34 Prior to or at the Start of International Preliminary Examination42 rules
MPEP § 1872 — Availability of the International Application File for International Preliminary Examination by the Examining Corps1 rules
MPEP § 1874 — Determination if International Preliminary Examination Is Required and Possible3 rules
MPEP § 1875 — Unity of Invention Before the International Preliminary Examining Authority24 rules
MPEP § 1875.01 — Preparation of Invitation Concerning Unity20 rules
MPEP § 1875.02 — Reply to Invitation Concerning Lack of Unity of Invention11 rules
MPEP § 1876 — Notation of Errors and Informalities by the Examiner9 rules
MPEP § 1876.01 — Request for Rectification and Notification of Action Thereon6 rules
MPEP § 1877 — Nucleotide and/or Amino Acid Sequence Listings During the International Preliminary Examination2 rules
MPEP § 1878 — Preparation of the Written Opinion of the International Preliminary Examining Authority85 rules
MPEP § 1878.01(a) — Prior Art for Purposes of the Written Opinion and the International Preliminary Examination Report19 rules
MPEP § 1878.02 — Reply to the Written Opinion of the ISA or IPEA44 rules
MPEP § 1879 — Preparation of the International Preliminary Examination Report91 rules
MPEP § 1879.01 — Time Limit for Preparing Report9 rules
MPEP § 1879.02 — Transmittal of the International Preliminary Examination Report and Related Documents10 rules
MPEP § 1879.03 — Translations16 rules
MPEP § 1879.04 — Confidential Nature of the Report5 rules
MPEP § 1880 — Withdrawal of Demand or Election10 rules
MPEP § 1881 — Receipt of Notice of Election and Preliminary Examination Report by the United States Patent and Trademark Office5 rules
MPEP § 1893 — National Stage (U.S. National Application Filed Under 35 U.S.C. 371)7 rules
MPEP § 1893.01 — Commencement and Entry24 rules
MPEP § 1893.01(a) — Entry via the U.S. Designated or Elected Office3 rules
MPEP § 1893.01(b) — Applicant for a U.S. National Stage Application28 rules
MPEP § 1893.01(c) — Fees17 rules
MPEP § 1893.01(d) — Translation19 rules
MPEP § 1893.01(e) — Inventor’s Oath or Declaration55 rules
MPEP § 1893.02 — Abandonment10 rules
MPEP § 1893.03 — Prosecution of U.S. National Stage Applications Before the Examiner5 rules
MPEP § 1893.03(a) — How To Identify That an Application Is a U.S. National Stage Application19 rules
MPEP § 1893.03(b) — The Filing Date of a U.S. National Stage Application16 rules
MPEP § 1893.03(c) — The Priority Date, Priority Claim, and Priority Papers for a U.S. National Stage Application62 rules
MPEP § 1893.03(d) — Unity of Invention27 rules
MPEP § 1893.03(e) — Documents Received from the International Bureau and Placed in a U.S. National Stage Application File33 rules
MPEP § 1893.03(f) — Drawings and PCT Rule 114 rules
MPEP § 1893.03(g) — Information Disclosure Statement in a National Stage Application12 rules
MPEP § 1895 — A Continuation, Divisional, or Continuation- in- Part Application of a PCT Application Designating the United States6 rules
MPEP § 1895.01 — Handling of and Considerations in the Handling of Continuations, Divisions, and Continuations-In-Part of PCT Applications34 rules