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.

Click here for the full text of this case.

A summary of this case will be posted on


To make sure you do not miss out on regular updates from the Kluwer Patent Blog, please subscribe here.

Kluwer IP Law

The 2022 Future Ready Lawyer survey showed that 79% of lawyers think that the importance of legal technology will increase for next year. With Kluwer IP Law you can navigate the increasingly global practice of IP law with specialized, local and cross-border information and tools from every preferred location. Are you, as an IP professional, ready for the future?

Learn how Kluwer IP Law can support you.

Kluwer IP Law
This page as PDF