T 0958/90 (Sequestering agent/DOW) of 4.12.1992

European Case Law Identifier: ECLI:EP:BA:1992:T095890.19921204
Date of decision: 04 December 1992
Case number: T 0958/90
Application number: 84307772.8
IPC class: C11D 3/33
Language of proceedings: EN
Distribution: B
Download and more information:
Decision text in EN (PDF, 536 KB)
Documentation of the appeal procedure can be found in the Register
Bibliographic information is available in: EN
Versions: Unpublished
Title of application: Mixtures containing nitrilotriacetic acid and iminodiacetic acid (or salts thereof) as a sequestering agent
Applicant name: The Dow Chemical Company
Opponent name: BASF Aktiengesellschaft, Ludwigshafen
Board: 3.3.01
Headnote: -
Relevant legal provisions:
European Patent Convention 1973 Art 54(1)
European Patent Convention 1973 Art 123(2)
European Patent Convention 1973 Art 123(3)
European Patent Convention 1973 R 58(2)
Keywords: Change of category, new use (no)
Catchwords:

1. The question of the admissibility of a change of category from a composition claim to a method of preparing the composition is left open (not decisive; point 4 of the reasons).

2. The use of a known physical entity for a known purpose does not represent a new technical teaching in the sense addressed in G 2/88 and G 6/88, if a hitherto unknown increase in activity occurs (point 6 of the reasons).

Cited decisions:
G 0002/88
G 0006/88
T 0231/85
Citing decisions:
T 0877/92
T 0262/94
T 0319/98
T 0684/02

Source: http://www.epo.org/law-practice/case-law-appeals/recent/t900958eu1.html

Date retrieved: 17 May 2021

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