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February 3, 2023

A Review of the Japan-Vietnam Patent Prosecution Highway


Although Vietnam has a number of mechanisms for accelerating the patent examination process, most of them have not lived up to the expectations of applicants. However, a fast-track patent prosecution highway (PPH) program was opened for the first time between the Intellectual Property Office of Vietnam (IP Office) and the Japan Patent Office (JPO) in January 2016, creating opportunities for all applications originating from Japan.

The PPH program has been rolled out in the following stages:

After more than six years of implementation, this program is considered successful and can be extended to support Japanese enterprises in establishing patent rights in Vietnam.


This program has many advantages, such as:

  • Applications originating from Japan are usually of good quality with clear and coherent specification It is possible that the IP Office’s requirements for specifications are already very consistent with Japanese applicants’ way of drafting specifications thanks to the JPO’s training programs for the IP Office.
  • Patents in Japan usually have a short examination timeline and are granted very quickly, even within the application filing timeline in Vietnam (12 months from the priority date for applications filed under the Paris Convention and 31 months from the priority date for applications filed as PCT national phase applications).
  • The coordination between the JPO and the IP Office has been very good. PPH applications are processed in a quick and efficient manner.
  • Japanese applicants and their representatives also often coordinate well with the IP Office to rectify formality shortcomings and avoid prolongation of the examination period.

Although there are no official statistics from the IP Office, according to independent statistics for applications whose PPH requests were filed by Tilleke & Gibbins’ associate firm (one of the most prolific filers under the PPH), the examination period for applications under the PPH has been significantly shortened, compared to the period for substantive examination as prescribed by law (18 months):

  • The average period for receiving the first office action as from the date of the PPH request is 8.53 months.
  • The average period for receiving a notice of allowance without an office action from the date of requesting PPH is 7.98 months.

Further, the prescribed 18-month time limit for examination is often difficult to achieve for various reasons, and the actual examination period for applications not under the PPH program is typically much longer than 18 months in practice. Obviously, the PPH has been providing a tremendous time benefit to Japanese applicants.

Current Status

Since its inception, the PPH program has attracted the attention of many Japanese enterprises and industrial property representatives in Vietnam. In fact, in the first rounds of this program, the timeline for the number of requests to reach the limit was often very short, and in many cases the limit was reached on the very first day the round was opened.

However, despite the PPH’s apparent effectiveness, recent monitoring of the number of applications as well as the time limit for filing PPH requests shows that this program has not been attracting the attention of Japanese applicants as much as before. According to the above figure, the number of days to reach the request limit has increased in every period since 2020. By 2022, the first round, which was opened on April 1, 2022, had not even reached 100 requests after six months, and the 34 remaining spots were moved to the second round, which was opened on October 1, 2022.

It is not clear why Japanese applicants have shown reduced interest in the PPH program after its initial popularity, though it is worth noting that the time period in which the number of PPH requests was slower to reach the limit (from October 2020 to mid-2022), coincided with the period when Japan and Vietnam were most affected by the Covid-19 pandemic. This may have affected the management strategy of Japanese enterprises as well as the budget for promoting IP portfolios.

Upcoming Changes

Article 114 of Vietnam’s amended IP Law, which took effect on January 1, 2023, allows the IP Office to use the results of substantive examination of a patent application claiming the same invention filed with a foreign patent office in the process of assessing the patentability of the corresponding Vietnamese application. The latest draft of a circular to replace Circular 01/2007, which guides the implementation of the IP Law, also includes provisions intended to allow an applicant to proactively request the IP Office to proceed in this manner. Also according to this draft circular, if the IP Office accepts the applicant’s request, a communication on substantive examination results must be issued for the Vietnamese application within 12 months from the date of the request.

As such, Article 114 of the IP Law seems to open a new door for patent applicants in accelerating the examination process in Vietnam. This program is expected to be equally effective and possibly even more effective than existing acceleration programs. The scope of expedited examination is extended to applicants from all countries and is not limited only to applications originating from Japan and South Korea (which has its own PPH with Vietnam) or applications with equivalent applications filed in ASEAN countries under the ASPEC program.

Although on the positive side, the expedited process will give applicants more options, on the other hand, because of the overlap in the results that can serve as basis for examination, this new program will “steal” applications from the PPH program. Thus, once the new program goes into effect, Japanese applicants will no longer have a significant advantage over applicants from other countries that can use foreign results. However, according to the statistics cited above, the average examination period of the PPH program may still be shorter, and the PPH program has been operating in a stable manner; hence, in the early period once the new program is in place, the Japan PPH may still be more attractive.

As Vietnam currently does not have a mechanism for extending the protection term of a patent, the early granting of a protection title is still an advantage. The PPH remains an effective channel for Japanese applicants in expediting the examination and granting of patents in Vietnam.

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