https://legalblogs.wolterskluwer.com/patent-blog/t108513-a-crystal-clear-test-for-purity/
T1085/13: A crystal-clear test for purity | Kluwer Patent Blog
This recent decision from an EPO Board of Appeal is a rather satisfying development in how patentability (especially novelty) of purity claims is assessed at...
crystal clearfor purity