Patent worksharing

The United States Patent and Trademark Office (USPTO) enters into patent worksharing arrangements with foreign intellectual property (IP) offices to improve patent examination efficiency and facilitate cooperation within the global patent system. Patent worksharing permits IP offices to collaborate in the examination of commonly filed patent applications. These are typically associated through a claim of foreign priority under an international framework, such as the Paris Convention or the Patent Cooperation Treaty (PCT).

A number of patent filing trends motivate many IP offices to enter into patent worksharing arrangements. These include an ever-increasing rate of patent application filings, an exponential growth in the body of prior art available, a growing complexity of new technologies, and limited IP office resources. Further, global patenting strategies have led innovators and businesses to increasingly file common patent applications across a number IP offices.

Historically, the IP5 offices—a forum of the world’s five largest IP offices—have led worksharing efforts, as they account for the majority of the world’s patent applications. However, other jurisdictions are emerging as innovation hubs in cutting-edge technologies, are becoming essential components of global supply chains, or are drawing foreign investment from global businesses. The increasing relevance of these jurisdictions is driving an increased number of patent application filings beyond the largest offices, leading to redundant filings across many IP offices.

Patent worksharing reduces many of the inefficiencies that IP offices experience when repeating each other’s work. The inter-office collaboration made possible by patent worksharing also leads to higher-quality patents and the timelier issuance of patent rights. The benefits of worksharing can be especially significant when the offices involved have different capabilities and strengths that can be leveraged by each other. This can come in the form of accessibility to prior art in different languages or even IT resources and tools.

The USPTO has various patent worksharing arrangements, including the Patent Prosecution Highway, the Parallel Patent Grant, and others. For more information, visit the USPTO’s Pursuing international IP protection page.

Patent Prosecution Highway 

Patent prosecution highway logo

The Patent Prosecution Highway (PPH) is an applicant-driven patent worksharing arrangement between two or more IP offices. PPH arrangements allow an applicant that has received a favorable decision from a first participating IP office to request fast-track examination of a corresponding patent application that is pending in a second participating IP office. The USPTO is party to various bilateral and multilateral PPH arrangements, most notably the Global and IP5 PPH arrangements. For more information, see the USPTO’s PPH webpage.

Accelerated Patent grant logo

Accelerated Patent Grant

The Accelerated Patent Grant (APG) is an applicant-driven patent arrangement between the USPTO and a partner IP office. An applicant who has received a U.S. patent may request the partner office to grant its national patent on a corresponding application pending in that office, on the basis of the U.S. patent and without a substantive examination taking place, subject to the relevant laws of that country. The USPTO currently has APG agreements with Cambodia and Mexico. It is anticipated that the program will be expanded to additional patent offices in the future. 

Cambodia: The USPTO entered into an APG arrangement with Cambodia’s Ministry of Industry, Science, Technology & Innovation (MISTI) in October 2020. For further information: 

Mexico: The USPTO entered into an APG arrangement with the Mexican Institute for Industrial Property (IMPI) in August 2023. Guidelines and a user guide were published in November 2023. For further information:

Parallel Patent Grant 

The Parallel Patent Grant (PPG) is an office-driven patent worksharing arrangement for expediting the grant of a foreign patent based on an issued U.S. counterpart patent. The USPTO and Mexican Institute for Industrial Property (IMPI) launched a pilot PPG program in 2020. Under PPG, IMPI intends to review corresponding patent applications to ensure compliance with eligible subject matter under Mexican IP law and will directly notify qualifying patent applicants about the possibility of taking advantage of PPG. IMPI will also make effective use of the USPTO search and examination results in expediting the grant of Mexico corresponding patents.

Other patent worksharing programs

PCT Collaborative Search and Examination Pilot (CS&E): The CS&E is a pilot program that allows examiners from the IP5 offices (in their capacity as PCT International Authorities) to collaborate on the search and examination of a single international application. The result is an international search report (ISR) and written opinion (WO) from the chosen International Searching Authority (ISA) based on contributions from all participating offices. For more information on this worksharing arrangement, visit the USPTO’s CS&E webpage.

Expanded Collaborative Search Pilot (CSP): The expanded CSP provides applicants with search results from multiple offices early in the examination process for common patent applications. It is designed to accelerate examination and provide applicants with more comprehensive prior art by combining the search expertise of examiners at the USPTO, the Japan Patent Office, and/or the Korean Intellectual Property Office before issuing a first office action. For more information on this worksharing arrangement, visit the USPTO’s CSP webpage.