The Supreme Court held that Article 68 (3) IP Code relating to prior use, sets forth both a “quantitative” and a “qualitative” limit, in the sense that it “serves to identify the business behavior which determines the limit of the monopoly granted to the patent holder in respect of the prior user”. Since the prior use of the claimed substance and purification process thereof entails a single business behavior, whereas it was impossible to attribute autonomous economic value to the purification process claimed by the second patent, said prior use could only protect the infringer in respect of the first patent.

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