About Intellectual Property IP Training IP Outreach IP for… IP and... IP in... Patent & Technology Information Trademark Information Industrial Design Information Geographical Indication Information Plant Variety Information (UPOV) IP Laws, Treaties & Judgements IP Resources IP Reports Patent Protection Trademark Protection Industrial Design Protection Geographical Indication Protection Plant Variety Protection (UPOV) IP Dispute Resolution IP Office Business Solutions Paying for IP Services Negotiation & Decision-Making Development Cooperation Innovation Support Public-Private Partnerships The Organization Working with WIPO Accountability Patents Trademarks Industrial Designs Geographical Indications Copyright Trade Secrets WIPO Academy Workshops & Seminars World IP Day WIPO Magazine Raising Awareness Case Studies & Success Stories IP News WIPO Awards Business Universities Indigenous Peoples Judiciaries Genetic Resources, Traditional Knowledge and Traditional Cultural Expressions Economics Gender Equality Global Health Climate Change Competition Policy Sustainable Development Goals Enforcement Frontier Technologies Mobile Applications Sports Tourism PATENTSCOPE Patent Analytics International Patent Classification ARDI – Research for Innovation ASPI – Specialized Patent Information Global Brand Database Madrid Monitor Article 6ter Express Database Nice Classification Vienna Classification Global Design Database International Designs Bulletin Hague Express Database Locarno Classification Lisbon Express Database Global Brand Database for GIs PLUTO Plant Variety Database GENIE Database WIPO-Administered Treaties WIPO Lex - IP Laws, Treaties & Judgments WIPO Standards IP Statistics WIPO Pearl (Terminology) WIPO Publications Country IP Profiles WIPO Knowledge Center WIPO Technology Trends Global Innovation Index World Intellectual Property Report PCT – The International Patent System ePCT Budapest – The International Microorganism Deposit System Madrid – The International Trademark System eMadrid Article 6ter (armorial bearings, flags, state emblems) Hague – The International Design System eHague Lisbon – The International System of Appellations of Origin and Geographical Indications eLisbon UPOV PRISMA Mediation Arbitration Expert Determination Domain Name Disputes Centralized Access to Search and Examination (CASE) Digital Access Service (DAS) WIPO Pay Current Account at WIPO WIPO Assemblies Standing Committees Calendar of Meetings WIPO Official Documents Development Agenda Technical Assistance IP Training Institutions COVID-19 Support National IP Strategies Policy & Legislative Advice Cooperation Hub Technology and Innovation Support Centers (TISC) Technology Transfer Inventor Assistance Program WIPO GREEN WIPO's Pat-INFORMED Accessible Books Consortium WIPO for Creators WIPO ALERT Member States Observers Director General Activities by Unit External Offices Job Vacancies Procurement Results & Budget Financial Reporting Oversight

PCT Information Service

The PCT Information Service can be contacted as follows:

Telephone opening hours are from 9.00 a.m. to 6.00 p.m. Central European time (from 3.00 a.m. to 12.00 p.m. (noon) US Eastern time zone).

  • Specifically and only for inquiries relating to:
  • international applications filed directly with the International Bureau (IB) in its capacity as receiving Office (RO/IB), or
  • international applications transmitted to the IB as receiving Office under PCT Rule 19.4 (that is: where the national (or regional) Office with which the application was filed is not competent to receive the application concerned; where the application is not in a language accepted by that national Office; or for any other reason where the national Office and the IB agree that the procedure under this Rule should apply),

Please contact the PCT Receiving Office Section of the IB:  

Further information on filing directly at the IB.

  • From January 1, 2020, the International Bureau (IB), also as receiving Office (RO/IB) does not send faxes.  Although strongly discouraged and only in emergency situations, applicants are able to send faxes to the IB, including as RO/IB, at: +41 22 338 82 70 or +41 22 338 90 90.  Applicants who intend to send a fax to the IB during regular business hours at the IB (9.00 to 18.00, Central European Time), should contact the “authorized officer” indicated on the PCT forms by telephone to inform them that they plan to send a fax (the telephone number can be found at https://pct.wipo.int/ePCTExternal/pages/TeamLookup.xhtml).  If outside of business hours at the IB, applicants can leave a message on the answering machine. If applicants do send documents to the IB by fax it will still be necessary to furnish the original of the document within 14 days from the date of transmission if the document concerned is the international application or a replacement sheet containing corrections or amendments of the international application.PDF