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Exceptions to Lack of Novelty of Invention

Q1. We understand that Japan has a grace period for avoiding certain public disclosures from constituting prior art against a Japanese application.  How long is this grace period?

A1.  The grace period defined under Article 30 of the Japanese patent law (Exceptions to Lack of Novelty of Invention) is 6 months from the date of public disclosure.

Q2. What type of disclosures is capable of taking advantage of the Exceptions to Lack of Novelty of Invention in Japan?

A2.  According to current Article 30 of the Japanese patent law (effective as of April 1, 2012), virtually any disclosure, including “inventions made public at meetings and seminars, which are not academic conference designated by the Commissioner of the Patent Office, inventions made public on TV and radio, and inventions made public through sales”, are covered by the Exceptions to Lack of Novelty of Invention.  However, a patent publication is not a non-prejudicial disclosure.

Q3. Is the grace period applicable to scientific articles published on the web? 

A3.  The 6-month grace period is also applicable to electronic publications of scientific articles.  When a scientific article is published in the form of an electronic publication in advance to the publication in print, the 6-month grace period will start from the date of the electronic publication.  This rule applies not only to a free electronic publication, but also to an electronic publication which requires registered membership and/or purchase of the publication for accessing the electronic publication.

Q4. An invention has been published as a scientific article and a basic patent application has been filed in the US within 6 months from the publication of the scientific article.  Already 10 months have passed from the publication of the scientific article, but is it still possible to enjoy the benefit of the Japanese 6-month grace period by filing a Japanese patent application claiming the Paris convention priority from the basic US application filed within 6 months from the publication date? 

A4.  No.  Claiming of the Paris convention priority does not allow the filing date in Japan to date back for the purpose of grace period.  In other words, when a basic application is filed in other country within 6 months from the date of public disclosure, and a Japanese patent application claiming the convention priority from the basic application is filed after the expiration of the 6-months grace period, the Japanese patent application cannot enjoy the benefit of the grace period.

For receiving the benefit of the 6-month grace period in Japan, the Applicant must file within the 6-month grace period either one of the following applications:

   (1) Japanese national patent application*, or

   (2) PCT application designating Japan as one of the designated states. 

* Either a Japanese patent application or a PCT application claiming the convention priority from this Japanese patent application can be filed after the expiration of the grace period and still enjoy the benefit of the grace period.

Q5. What are the steps necessary for obtaining the benefit of the Japanese 6-month grace period?  

A5.  Necessary steps are explained separately for Japanese national patent application and PCT application.

Japanese national patent application:

A patent application is filed simultaneously with a Request for Grace Period within 6 months from the date of public disclosure.  Alternatively, the Request may be omitted by stating such effect in the patent application.

Next, a Document Verifying the Request, which is signed by all applicants, is filed within 30 days from the filing date of the patent application.  Filing of a specific evidence material (such as a copy of the scientific article disclosing the invention) is not required, but it is most advisable to file the evidence material with the Document.

PCT application designating Japan:

When a PCT application designating Japan as one of the designated states is filed within the 6 month grace period, such a PCT application will obtain the benefit of the grace period even when the PCT application enters the Japanese national phase after the expiration of the grace period (i.e., within non-extensible 30 month deadline).  In this case, both the Request for Grace Period and the Document Verifying the Request are filed within 30 days from the entry into the Japanese national phase. 

[Filing of the Request for Grace Period can be omitted when “Declaration as to Non-Prejudicial Disclosures or Exceptions to Lack of Novelty” (PCT Rule 4.17(v), 26ter.1) is made at the international stage.]

The Document Verifying the Request can be prepared at our end and forwarded for execution by the applicant(s). 

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