T 0254/86 (Yellow dyes) of 5.11.1987

European Case Law Identifier: ECLI:EP:BA:1987:T025486.19871105
Date of decision: 05 November 1987
Case number: T 0254/86
Application number: 80103005.7
IPC class: C09B 62/085
Language of proceedings: EN
Distribution: A
Download and more information:
Decision text in EN (PDF, 671 KB)
Documentation of the appeal procedure can be found in the Register
Bibliographic information is available in: EN
Versions: OJ | Published
Title of application: -
Applicant name: Sumitomo
Opponent name: -
Board: 3.3.02
Headnote: An invention which relies on a substantial and surprising improvement of a particular property need not also show advantages over the prior art with regard to other properties relevant to its use, provided the latter are maintained at a reasonable level so that the improvement is not completely offset by disadvantages in other respects to an unacceptable degree or in a manner which contradicts the disclosure of the invention fundamentally (following T 57/84, "Tolylfluanid", 12.8.86, to be reported and T 155/85, "Passivation of Catalyst", 28.7.87, to be reported).
Relevant legal provisions:
European Patent Convention 1973 Art 56
European Patent Convention 1973 R 27(1)(d)
Keywords: Inventive step (affirmed)
Technical problem - Combination of effects
Comparison with closest state of the art
Improvement - no improvement in every respect required
Catchwords:

-

Cited decisions:
-
Citing decisions:
T 0405/86
T 0138/87
T 0302/87
T 0630/88
T 0282/90
T 0470/90
T 0656/90
T 0373/94
T 0070/95
T 0366/97
T 0107/99
T 1060/99
T 0287/02
T 0454/02
T 0574/04
T 0452/05
T 1387/06
T 0940/07
T 1406/07
T 1065/08
T 0365/09
T 1000/10
T 1742/12
T 1939/12
T 1985/12

Source: http://www.epo.org/law-practice/case-law-appeals/recent/t860254ex1.html

Date retrieved: 17 May 2021

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