Key points
- Technical Board 3.3.04 referred questions to the Enlarged Board regarding the entitlement to priority.
- There is a single decision to refer question, taken in consolidated proceedings T2719/19 and T1513/17 (see Art.10(2) RPBA 2020), such that referral is assigned the references G1/22 and G2/22 *. Case T2719/19 is about the pending application EP3056218 (16160321.2), T1513/17 is about granted patent EP1755674 (05779924.9), being the parent of EP'218.
The case at hand- “The priority application was filed [in 2004, as a US provisional application] in the name of R.P. Rother, H. Wang and Z. Zhong, the inventors. The PCT application names R.P. Rother, H. Wang and Z. Zhong as inventors and as applicants with designation for the United States of America (US) only. It also names as applicants Alexion Pharmaceuticals, Inc. and the University of Western Ontario as applicants for all designated States except the US.”
- “The opposition division held, as far as presently relevant, the following. ... An assignment of the priority rights of the inventors Wang and Zhong to the appellant or the University of Western Ontario had not taken place prior to the filing of the PCT application.” The priority was held invalid and the claims were held thus to lack novelty over publication D20.
- The Board considers the request for correction under Rule 139 of the PCT request form, because “the board agrees with the respondents [opponents] that the form correctly expresses what was actually intended at the time of filing of the PCT application, namely that the applicants for all Designated States other than the United States of America were the appellant and the University of Western Ontario.”
No legal basis for the PCT Request approach? - The applicant/patentee argues that priority is valid based on the argument that: “it is sufficient that all the inventors, named as applicants of the priority application, are among the applicants of the later PCT application, even if for the designation US only. ”
- The Board calls this the "PCT joint applicants approach" but acknowledges that the terminology is tricky. If the inventors are joint applicants, then probably the argument has some force, but as can be seen below, the Board considers that the inventors are not joint applicants in any relevant sense.
- “The board is further aware that the approach has been followed in a number of cases before opposition divisions, whether or not referring to the Notice from the European Patent Office concerning the requirements to be observed when filing an international application with the EPO as a PCT receiving Office, OJ 2014, A33, III, 9 ” [ case numbers can be found in the decision]
- I could add that I recall an EPO lawyer participating in a panel session of the AIPPI Congress 2021 also indicating that this was the practice of the first instance departments yet to be considered by the Boards of Appeal.
- The Board: “The issue therefore concerns a point of law of fundamental importance relevant to a number of cases at present pending before opposition divisions and boards of appeal. Although legal requirements for patent applications in the US have changed, thus leading to a reduction in the number of cases in which the facts are similar to those in the present case in the future, the issue will remain of major importance for many years to come. In addition, the answer to the question of whether the PCT joint applicants approach can be accepted as suggested by the appellant is not clear cut.”
- The Board does not see legal basis for the PCT joint applicant's approach per see: “Neither Article 11(3) PCT nor Article 153(2) EPC provide that PCT applicants for a different territory - in the present case the inventors as applicants for the United States - shall be regarded as applicants for all other designated territories as well. On the contrary, the possibility of designating different applicants for different designated States (see PCT Regulation Article 4.5(d)) must necessarily mean that the status as an applicant is limited to the designated territories. Article 118 EPC can therefore in the opinion of the board not be applied to the present situation.”
- “[It was] argued that a PCT joint applicants approach can be based on the unitary character of the priority right in the PCT and thus on the operation of the PCT alone. The board cannot see merit in this argument either. The PCT does not create rules of its own regarding the effect of a priority claim but refers to Article 4 of the Paris Convention (Article 8(2)(a) PCT).”
Transfer by implicit agreement - The patentee also submits a different legal basis, which I briefly summarize as that the manner of filing the PCT application at hand is a presumption of a tacit transfer of the priority right from the inventors to the relevant PCT applicant, with the additional argument that such a tacit transfer is permitted under the applicable law, the applicable law being the EPC itself. For the latter point, the patentee refers to the judgement of the Court of Appeal (CoA) of The Hague in the case Biogen/Genentech v. Celltrion (Gerechtshof Den Haag 30 July 2019; informal translation in my earlier post here.
- The Board, after summarizing the reasoning of the CoA The Hague: “This approach seems appealing as it provides for a harmonised and well-founded assessment of an alleged transfer of the priority right. However, an issue with this approach lies in the uncertainty regarding the legal system that is applicable to the assessment of the transfer of the priority right: in several decisions of the boards of appeal, the legal requirements for the transfer of the priority right by agreement have been assessed applying national law. In spite of this, it is far from clear that this is correct, as the EPC does not contain any conflict of laws-rules and this issue has so far not been addressed by the EBA. A separate question relating to conflict of laws-rules to be applied to a transfer of the priority right is nonetheless not necessary because it is inherently contained in the questions posed and it will be addressed in the considerations of the EBA, as needed.”
- The Board: “Were the EBA to share the view of the CoA [The Hague] that the legal system to be applied to assess the priority right is solely the EPC, then it seems that the EPC does not, in Article 87 EPC or elsewhere, impose any formal requirements for the transfer of the priority right by agreement []. In that case it could be argued that the mutual filing of a PCT application [...] demonstrates - absent indications to the contrary - the existence of an implicit agreement between party A and party B, conferring on party B the right to benefit from the priority for the EPC territory. This implicit agreement could possibly be sufficient to bring about the transfer of the priority right to party B for the EPC territory.”
The jurisdiction issue (first question) - The Board then adds for good measure as a preliminary question essentially whether the EPO is competent to examine the entitlement to priority at all because, even though T844/18 Crispr said "yes", the Board is receptive to the argument of the parties that, if questions regarding priority are to be referred to the EBA on a related matter, this is a convenient opportunity to have a final decision on the "jurisdiction issue" as well.
Second question - Turning to the second question, the Board essentially presents the relevant facts and then asks if the priority is valid.
"The following questions are referred to the Enlarged Board of Appeal:
I. Does the EPC confer jurisdiction on the EPO to determine whether a party validly claims to be a successor in title as referred to in Article 87(1)(b) EPC?
II. If question I is answered in the affirmative
Can a party B validly rely on the priority right claimed in a PCT-application for the purpose of claiming priority rights under Article 87(1) EPC
in the case where
1) a PCT-application designates party A as applicant for the US only and party B as applicant for other designated States, including regional European patent protection and
2) the PCT-application claims priority from an earlier patent application that designates party A as the applicant and
3) the priority claimed in the PCT-application is in compliance with Article 4 of the Paris Convention?"
EPO G 2/22 ; G1/22; T2719/19
The link to the decision is provided after the jump, as well as (an extract of) the text of the decision.