T 0820/94 (Polypeptide production/Celltech Limited) of 29.11.1996

European Case Law Identifier: ECLI:EP:BA:1996:T082094.19961129
Date of decision: 29 November 1996
Case number: T 0820/94
Application number: 86905378.5
IPC class: C12P 21/02
Language of proceedings: EN
Distribution: C
Download and more information:
Decision text in EN (PDF, 136 KB)
Documentation of the appeal procedure can be found in the Register
Bibliographic information is available in: EN
Versions: Unpublished
Title of application: Polypeptide production
Applicant name: CELLTECH LIMITED
Opponent name: Unigene Labs. Ltd.
Board: 3.3.04
Headnote: -
Relevant legal provisions:
European Patent Convention 1973 Art 111(1)
Keywords: Revocation of patent upon Proprietor's request


Cited decisions:
T 0092/88
T 0459/88
T 0677/90
T 0322/91
T 0186/94
Citing decisions:
T 1610/07

Summary of Facts and Submissions

I. European patent No. 0 236 416 with the title "Polypeptide production" was granted with ten claims based on European patent application No. 86 905 378.5.

II. A notice of opposition was filed requesting the revocation of the patent under Article 100(a) EPC (lack of novelty and inventive step).

III. By a decision dated 10 August 1994, the Opposition Division rejected the opposition according to Article 102(2) EPC.

IV. The Appellant (Opponent) lodged an appeal against the decision of the Opposition Division, requesting that the decision under appeal be set aside and the patent be revoked. A statement of grounds of appeal was filed.

V. With a letter dated 17 January 1996, the Respondent (Patentee) stated that "... the Proprietor hereby agrees to revocation of the above identified European patent."

Reasons for the Decision

1. The appeal is admissible.

2. The Respondent (Patentee) has agreed to the revocation of the patent after notice of appeal has been filed.

3. In case T 0186/84 (OJ EPO 1986, 79), the Board of appeal decided that the request made by a patent proprietor during the appeal stage of the opposition proceedings that his patent be revoked is equivalent to withdrawal of his agreement- required for the purpose of Article 113(2) EPC- to the text of the patent as granted and that on this basis the patent must be revoked without examination of the substantive grounds for opposition.

4. In T 0459/88 (OJ EPO 1990, 425), the Board further explained that " if, in proceedings before the EPO, the patent proprietor himself requests that his patent be revoked, there can scarcely be anymore cogent reason for revoking it since it cannot be in the public interest to maintain a patent against its proprietor's will."

5. Since these decisions were given, the Boards of Appeal have decided in a number of cases to revoke patents under Article 111(1) EPC at the request of their proprietors (e.g. T 0677/90 dated 17 May 1991, T 0092/88 dated 19 September 1991, T 0322/91 dated 14. October 1993).

6. In the present case, the Board interprets the Proprietor's agreement to the revocation of the patent as meaning that he no longer wishes his patent to be maintained and, thus, as a request for revocation.

7. The Board can, therefore, in the exercise of its power under Article 111(1) EPC decide to revoke the European patent.


for these reasons it is decided that:

1. The decision under appeal is set aside.

2. The patent is revoked.

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