In most

patent A patent is a type of intellectual property that gives its owner the legal right to exclude others from making, using, or selling an invention for a limited period of time in exchange for publishing an sufficiency of disclosure, enabling disclo ...

laws, unity of invention is a formal administrative requirement that must be met by a

patent application A patent application is a request pending at a patent office for the grant of a patent for an invention described in the patent specification and a set of one or more claims stated in a formal document, including necessary official forms and rel ...

to become a granted patent. Basically, a patent application can relate only to one invention or a group of closely related inventions. The purpose of this requirement is administrative, as well as financial. That is, the requirement serves to preclude the option of filing one patent application for several inventions, while paying only one set of fees (filing fee, search fee, examination fee, renewal fees, and so on). Unity of invention also makes the classification of patent documents easier. When a patent application is objected to on the ground of a lack of unity, it may be still considered for patent protection, unlike in the case where the invention is found to be lacking novelty. A

divisional application A divisional patent application, also called divisional application or simply divisional, is a type of patent application that contains subject-matter from a previously filed application, the previously filed application being its parent applicatio ...

can usually be filed for the second invention, and for the further inventions, if any. Alternatively, a patent prosecutor may make a technical argument that there is unity of invention.

Jurisdictions

European Patent Convention

Under

European patent The European Patent Convention (EPC), also known as the Convention on the Grant of European Patents of 5 October 1973, is a multilateral treaty instituting the European Patent Organisation and providing an autonomous legal system according to ...

practice and case law, lack of unity (of invention) can appear either "'' a priori''", before the prior art was examined, or "'' a posteriori''", after the prior art was examined. An ''a posteriori'' lack of unity usually results from a lack of novelty or inventive step of the subject-matter of one independent claim.

Patent Cooperation Treaty

Under the Patent Cooperation Treaty (PCT), an international application, which is also called PCT application, "shall relate to one invention only or to a group of inventions so linked as to form a single general inventive concept". If the requirement of unity of invention is not met, the International Searching Authority (i.e., the patent office in charge of carrying out the international search) "is entitled to request the applicant to pay an additional search fee for each invention beyond the first which is to be searched".Practical Advice, The consequences of a finding by the ISA of lack of unity of invention
PCT Newsletter, August 2008, p. 6.Practical Advice, Addressing a finding of lack of unity of invention by the ISA
(als
here in pdf
, PCT Newsletter, June 2021, pp. 11-13. In reaction to such a request from the International Searching Authority (ISA), the applicant may pay all or some of the requested additional search fees, and the International Searching Authority (ISA) then establishes the international search for all or some of the inventions or groups of inventions, respectively. The applicant may also decide not to pay any of the additional search fees, and, in such case, the ISA does not carry out a search for the inventions or groups of inventions for which no search fees have been paid. The international search report (ISR) is then established only for the first claimed invention. If the applicant disagrees with the ISA’s finding of lack of unity of invention, the additional fees may be paid under protest. In the protest procedure, the applicant files a reasoned statement explaining why it considers that the requirement of unity of invention has been complied with, or that the number of additional fees required is excessive. After payment of the additional search fees and, if required, of a protest fee, the protest is examined by a review body. If the review body finds the protest justified, it orders the total or partial reimbursement of the additional search fees, and, if applicable, the protest fee, to the applicant. When, for instance, the European Patent Office acts as ISA, the review body in charge of examining the protest consists of three members: "the head of a directorate, normally the head of the directorate by which the invitation to pay additional fees was issued, an examiner with special expertise in unity of invention and, normally, the examiner who issued the invitation."''Decision of the President of the European Patent Office dated 24 June 2007 providing for review panels for the implementation of the protest procedure under the PCT''
Special edition No. 3 OJ EPO, p. 140. This decision is also referred to as: "Decision concerning the PCT protest procedure".

United States

In U.S. patent law, applications that claim more than one distinct invention may be subject to restriction to a single invention, and the applicant may prosecute the remaining invention(s) by filing a

(s). A "restriction requirement" will typically present the different inventions based on the claims within the application, and the applicant may elect which invention he would prosecute.

References

External links

* European Patent Convention (EPC) ** ** * Patent Cooperation Treaty (PCT) ** : Unity of Invention ** : Lack of Unity of Invention (International Search) ** : Lack of Unity of Invention (International Preliminary Examination) * Title 35 of the United States Code (35 U.S.C.) *
35 U.S.C. §121: Divisional applications
{{DEFAULTSORT:Unity Of Invention Patent law