T 0004/83 (Purification of sulphonic acids) of 16.3.1983

European Case Law Identifier: ECLI:EP:BA:1983:T000483.19830316
Date of decision: 16 March 1983
Case number: T 0004/83
Application number: 78300810.5
IPC class: -
Language of proceedings: EN
Distribution: A
Download and more information:
Decision text in EN (PDF, 406 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: Exxon
Opponent name: -
Board: 3.3.01
Headnote: Where an invention concerns an improvement in a known purification process, a test described in that connection which serves to confirm the desired result of the purification process does not make obvious the incorporation of the known features of the said test as a final step in the purification process, if the relevant disclosure is confined to the test procedure and gives no pointer to the claimed solution of the problem.
Relevant legal provisions:
European Patent Convention 1973 Art 56
European Patent Convention 1973 Art 52(1)
Keywords: Inventive step - improvement, known process
Test procedure not integral part of a process
Catchwords:

-

Cited decisions:
-
Citing decisions:
T 0641/89
T 1016/92
T 1051/92
T 1096/92
T 0993/98
T 0357/00
T 0006/01
T 0632/02
T 1890/06

Source: http://www.epo.org/law-practice/case-law-appeals/recent/t830004ex1.html

Date retrieved: 17 May 2021

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