T 0004/83 (Purification of sulphonic acids) of 16.03.1983
- European Case Law Identifier
- ECLI:EP:BA:1983:T000483.19830316
- Date of decision
- 16 March 1983
- Case number
- T 0004/83
- Petition for review of
- -
- Application number
- 78300810.5
- IPC class
- -
- Language of proceedings
- English
- Distribution
- Published in the EPO's Official Journal (A)
- Download
- Decision in English
- Other decisions for this case
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- Abstracts for this decision
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- Application title
- -
- 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 Art 52(1) 1973European Patent Convention Art 56 1973
- Keywords
- Inventive step - improvement, known process
Test procedure not integral part of a process - Catchword
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- Cited cases
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ORDER
For these reasons, it is decided that:
1. The decision of the Examining Division of the European Patent Office dated 4 August 1982 is set aside.
2. The case is remitted to the first instance with the order to grant a European patent on the basis of the following documents: