T 0741/91 (BON-3-acid/Ueno) of 22.9.1993

European Case Law Identifier: ECLI:EP:BA:1993:T074191.19930922
Date of decision: 22 September 1993
Case number: T 0741/91
Application number: 82104427.8
IPC class: C07C 65/11
Language of proceedings: EN
Distribution: B
Download and more information:
Decision text in EN (PDF, 560 KB)
Documentation of the appeal procedure can be found in the Register
Bibliographic information is available in: EN
Versions: Unpublished
Title of application: Process for preparation of 2-hydroxynaphathalene-3- carboxylic acid
Applicant name: Kabushiki Kaisha Ueno Seiyaku Oyo Kenkyujo
Opponent name: Hoechst Aktiengesellschaft
Board: 3.3.01
Headnote: -
Relevant legal provisions:
European Patent Convention 1973 Art 52
European Patent Convention 1973 Art 56
European Patent Convention 1973 Art 114(2)
Keywords: inventive step (yes)
problem and solution
comparative test - not expertly worked
feature disclosed in old document disregarded among experts
late submitted material - evidence admitted (no)
Catchwords:

1. A proper application of the so-called "problem-solution- approach" requires the avoidance of formulating artificial and unrealistic technical problems (following T 0495/91; No. 3.3 of the Reasons).

2. All embodiments falling within a process claim have to meet the requirements of patentability set out in Articles 52 to 57 EPC (No. 4.2 of the Reasons).

3. To be relevant, it is sufficient for experiments, which aim at establishing that the promised result cannot be obtained over the whole range of a claim that they are carried out according to the Claim and with the normal experience of the man skilled in the art (Nos.4.2 and 4.3 of the Reasons).

4. An experiment which was not expertly carried out is not credible and sufficient evidence that a claim comprises embodiments which do not solve the technical problem (No. 4.5 of the Reasons).

Cited decisions:
T 0495/91
Citing decisions:
T 0626/90
T 0731/91
T 0951/91
T 0334/92
T 0465/92
T 0712/92
T 0939/92
T 0039/93
T 0068/93
T 0221/93
T 0419/93
T 0813/93
T 0885/93
T 0930/94
T 0107/99
T 0692/04
T 0824/07
T 1715/08
T 2082/11

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