Where can I find detailed information about unity of invention under the Patent Cooperation Treaty (PCT)?

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Source: FAQ (MPEP-Based) BlueIron Update: 2024-09-27 10 Rules 5 Related FAQs 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. Detailed information about unity of invention under the Patent Cooperation Treaty (PCT) can be found in MPEP Chapter 1800 . Specifically, the following sections provide in-depth discussions: MPEP § 1850 MPEP § 1875 MPEP § 1893.03(d) As stated in MPEP 823 : “See MPEP Chapter 1800, in particular MPEP § 1850, § 1875, and § 1893.03(d), for a detailed discussion of unity of invention under the Patent Cooperation Treaty (PCT).” Related Rules from the Manual of Patent Examining Procedure 10 rules Collapse Benefits of Using Patent Cooperation Treaty MPEP 1893 Required Differences in Unity of Invention Analysis for National Stage Applications Under 35 U.S.C. 371 vs 111(a) MPEP 823 Permitted Requirement for Unity of Invention Before International Preliminary Examination MPEP 1875 Claim Restriction Required for Unity of Invention MPEP 1875 Required Objection for Lack of Unity of Invention MPEP 1875 Permitted Examiner May Consider Unity of Invention During IPEA MPEP 1875 Permitted Requirement for Unity of Invention MPEP 1875 Invitation to Pay Unity of Invention Fees Within One Month MPEP 1850 Required Unity of Invention for Different Categories MPEP 1850 Unity of Invention Determination Not Aligning with PCT Rules MPEP 1850 Other Related FAQs 5 FAQs Collapse Do the guidelines for other substantive and procedural matters apply to national stage applications under 35 U.S.C. 371? How does the Patent Cooperation Treaty (PCT) affect the examination of national stage applications? What is the purpose of unity of invention analysis in patent applications? What is the difference between unity of invention analysis and independent and distinct analysis? What happens if an applicant doesn&#8217;t respond to a lac...