Mayo Collaborative Services v. Prometheus Laboratories, Inc. (U.S. Supreme Court)

This case concerned the scope and validity of a patent that Prometheus Laboratories claimed over the testing of certain metabolites in blood to monitor appropriate medication dosages. On behalf of our client, Mayo Collaborative Services, we successfully sought certiorari from the Supreme Court. In the merits briefing, we argued that the patent that Prometheus claimed was invalid because it was a mere attempt to patent a “law of nature,” namely the relationship between certain medication dosages and the level of certain metabolites.  Under the longstanding rule that laws of nature, such as mathematical formulas and scientific laws, cannot be patented, this rendered the claimed patent invalid.



Petition for Certiorari

Reply brief

Brief for Petitioners

Reply Brief