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Date of decision
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06 June 1994
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Case number
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T 0852/91
- 3.3.1
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Application number
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86308053.7
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Title of the application
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Medicinal indole and indazole keto sulphone derivatives
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Applicant name
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ICI AMERICAS INC.
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Keywords
Inventive step (yes)
Structural similarity of chemical compounds
Existence of common general knowledge regarding equivalency
contested
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Catchwords:
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To deny inventive step for novel chemical compunds because of
their "structural similarity" to known chemical compounds would
be justified, if the skilled person knew, be it from common
general knowledge, or from some specific disclosure, that the
existing structural differences of the chemical compunds
concerned were so small that they would have no essential
bearing on those properties which are important for solving the
technical problem underlying the invention (No. 8.2)
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