Less than two months after CVC made the surprising move to revoke two of its seminal European CRISPR patents, Sigma-Aldrich has done it too. While the facts that led to Sigma’s “self” revocation may be different than CVC’s, this en vogue trend of avoiding final decisions is troubling because it denies the public of the certainty it deserves. 

The two Sigma patents involved are EP3138911 and EP3360964 (EP ’911 and EP ’964, respectively) directed to broad methods and compositions for modifying a chromosomal sequence in a eukaryotic cell by integrating a donor sequence using RNA-guided endonuclease, such as a CRISPR/Cas protein, with a nuclear localization signal.

Read the full post on Proskauer’s Minding Your Business blog.