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A divisional patent application is not defined under the Vietnam IP Law. However, it’s widely construed that a divisional patent application is a type of patent application which is divided from an original application (known as the parent application) when the original patent application does not meet unity requirements (e.g. contains multiple inventions), as stipulated in Article 101 of Vietnam IP Law.
The Vietnam IP Law does not does not impose a limit on the quantity or number of divisional applications, so the parent patent application may be divided into two or more applications.
Each industrial property registration application in Vietnam shall request the grant of only one protection title for a single industrial property object under the doctrine of unity requirement. In a broader sense, a patent application in Vietnam can not cover more than one invention. However, if a group of inventions that are technically linked to form a single common inventive concept, it is possible to request to grant protection for such a group of inventions in a single application. This exception is very similar to procedures for dealing with groups of inventions that are so interconnected that they form a single "inventive concept" that can be included in a single application under the European Patent Convention. In case of lack of unity of invention, the applicant may be required to either restrict the claims or divide the application (creating “divisional” applications). It is common practice, when filing under the PCT, to link groups of inventions in accordance with the European approach, and to divide the application as needed after entering the national phase.
The division of a patent application may occur under two circumstances, namely, (i) the patent applicant divides the application proactively, (ii) the Intellectual Property Office of Vietnam requests the division (IP VIETNAM).
One may file a divisional patent application for the following reasons:
A divisional patent application must bear a new application number and is entitled to the date of filing or date(s) of priority (if any) of the parent application; and shall be published on Industrial Gazette of Vietnam after IP VIETNAM issues a decision on acceptance of valid application.
For each divisional patent application, the applicant shall pay filing fees and all fees and charges for procedures carried out independently from the parent application (except for the procedures that are already completed when submitting the parent application and not required to be carried out again when submitting the divisional patent application) but shall be exempted from fees for examination of the priority claim. The divisional patent application shall be subject to formal examination and further processed according to the procedures not yet completed for its parent application. The divisional patent application shall be republished and the applicant shall pay fees for publication if the secondary application is submitted after IP VIETNAM issues a decision on acceptance of valid application for primary application.
The parent application (after being divided) shall be further processed under the procedures for amendments to the application. After following the procedures for amending the parent application, IP VIETNAM shall issue a notice on recognition of amendments to the application, publish such amended contents in case the parent application has been issued with the decision on acceptance of valid application and the applicant shall pay fees for examination of the request for amendments to the application.
A patent divisional application can be filed at any time as long as IP VIETNAM has not issued a Decision on rejection of a patent application, a Decision on grant or refusal of a patent. Remember two conclusions on the due date to file a patent divisional application in Vietnam:
In order to file a divisional application in the event of an appeal, the appeal against a refusal decision for the parent application must be successfully resolved and the parent application must be returned to the patent examination division of IP Vietnam for re-examination. Only then is it possible to file a divisional patent application.
A Notice of Allowance issued by IP VIETNAM is not a Decision on grant of a patent. As such, it is possible to file a division application upon receipt of the Notice of Allowance, provided that such a filing must be submitted to IP VIETNAM BEFORE a Decision on grant of a patent is issued.
As a matter of practice, IP VIETNAM issues Decisions on grant of patents for patent applications if they meet protection requirements, but do not always send those Decisions to applicants. Thus, the date of the Decision on grant of patents is only known after receipt of the original patents. In practice, IP VIETNAM issues Decisions on grant of patents within 2-3 months following the date of issuance of Notices on intention to grant patents. Thus, it is best to file a divisional application BEFORE or ON or WITHIN 1-2 weeks following the date of paying the granting fees to IP VIETNAM.
No, it is NOT possible to file a divisional application after receipt of a Decision on refusal of grant of a patent.
Statutorily, it is NOT possible to file a divisional application AFTER a Decision on rejection of a patent application, a Decision on grant or refusal of a patent is issued. In order to file a divisional application in case of an appeal, the appeal against a refusal Decision for the parent application must be firstly settled successfully and such a parent application must be then returned to the patent examination division of IP VIETNAM for re-examination, only at that time, it is possible to file a divisional application.
No explicit provisions are laid down in the IP Law of Vietnam on limitation of the number of divisional applications to be filed, provided that the filing of such application is made BEFORE Decision on rejection of a patent application, a Decision on grant or refusal of a patent is issued by IP VIETNAM.
What are the requirements for filing a divisional patent application in Vietnam?
There are 4 requirements that must be met for a divisional patent application in Vietnam. IP VIETNAM will deny the divisional application if neither of the requirements listed below are met.
A divisional patent application is a new application that is separate and independent from the parent application. Therefore, the divisional application procedure/examination is in principle independent from the parent application procedure/examination, and the divisional application is treated as a new application. A divisional patent application in Vietnam will be examined in two phases, i.e. formality examination and substantive examination:
IP VIETNAM will conduct formality examination for a divisional application within one month of the date the divisional application was received, as indicated on the application receipt seal. Where applicable, a Notice of Deficiency or Notice of Formality Acceptance will be issued within 01 month.
The time limit for substantive examination of a divisional application is determined in the same manner as the time limit for substantive examination of an ordinary application, i.e. 18 (eighteen) months from the date of its publication if a request for substantive examination is filed prior to the date of application publication, or from the date of receipt of a request for substantive examination if such request is filed after the date of application publication.
The divisional application may have (but not limited to) the following defects (deficiencies or shortcomings) which must be communicated to the applicant:
If the applicant filed the divisional application but the claimed subject matter of the divisional application was not contained in the claim of the parent application, and there was no amendment, supplement for the parent application, the divisional application shall be accompanied with a description of the claimed subject matter and the altered content of the divisional application in comparison with the filed parent application in order to demonstrate that the claimed subject matter in the divisional application was contained in the parent application and the divisional application does not extend the scope of protection beyond the content disclosed in the specification and does not alter the essence of the subject matter mentioned in the parent application.
For the divisional application and/or the parent application, the specification (including drawings) of the application may be modified in accordance with the subject matter mentioned in the claim of the application by removing the content irrelevant to the subject matter(s) mentioned in the claim of the application.
Final thoughts
A divisional application will incur additional fees and costs and/or complexity in managing the patent family. Thus, when weighing the fees and costs with the benefits of a divisional application, it is advisable to file divisional applications when the patent’s value or risk of infringement is high.
KENFOX IP & LAW OFFICE, one of the fastest growing patent law firms, provides the full range of IP services in Vietnam, Laos, Cambodia, Myanmar and other Asian countries. In 2019, KENFOX was listed in the Top 10 Patent Filers before the Intellectual Property Office of Vietnam (IP Vietnam). In 2020 and 2021, KENFOX was listed in the Top 20 Patent Filers before IP Vietnam. Please contact us if you are interested in IPR protection in the above-mentioned jurisdictions.
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