Applying Mayo to Myriad: Latest Decision Brings No New News (Plus: Why the Final Myriad Decision Might Not Matter for Personalized Medicine)

The latest chapter in the Myriad gene patent litigation was written yesterday, with the Federal Circuit issuing its much anticipated opinion (pdf) after rehearing the case following the Supreme Court’s unanimous decision earlier this year in Prometheus v. Mayo.

Or perhaps we should say that the latest chapter was “rewritten” as, in a move that surprised approximately nobody, and as we predicted earlier this spring, the Federal Circuit reached precisely the same result in its opinion today as it did last July when it issued its first substantive ruling in the Myriad litigation. Below, we examine how the Federal Circuit applied Mayo to Myriad, what the next step in the Myriad litigation is likely to be (spoiler alert: it’s another appeal) and why we think the final opinion in this case, whenever it arrives and whatever it says, might not matter all that much.

Applying Mayo to Myriad. As mentioned, the only major change since the last time the Federal Circuit ruled in Myriad, and the reason for the re-hearing, was the Supreme Court’s decision earlier this spring in Mayo.

However, Mayo was about method patents and the boundary between a patent-eligible method and a law of nature. It was not about product patents or the product of nature doctrine. Since the Federal Circuit had already invalidated all but one of Myriad’s method patents even before the Supreme Court tightened the criteria for method patents in Mayo, it was hard to see much of substance changing the second time around.


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Filed under General Interest, Genetic Testing/Screening, Genomic Policymaking, Genomic Sequencing, Genomics & Medicine, Genomics & Society, Industry News, Legal & Regulatory, Myriad Gene Patent Litigation, Patents & IP, Pending Litigation

Prometheus Patents Struck Down, 9-0: Mayo Collaborative Services v. Prometheus Laboratories, Inc. Analysis

In a strong rebuke to the Federal Circuit, a unanimous U.S. Supreme Court held (pdf), on March 20, 2012, that Prometheus Laboratories’ claims to methods of administering drugs to treat gastrointestinal autoimmune diseases do not meet the patentable subject matter standard of section 101 of the Patent Act.  The representative claim quoted by the Court recites, “A method of optimizing therapeutic efficacy for treatment of an immune-mediated gastrointestinal disorder” comprising two steps: (a) administering one of a class of drugs (thiopurines) and (b) determining the level of a specified metabolite, “wherein” a level below a given threshold “indicates a need to increase the amount of said drug subsequently administered” [to improve efficacy], and a level above the threshold “indicates a need to decrease the amount of said drug subsequently administered” [to avoid toxicity].

History of the Case. Mayo originally bought and used Prometheus test kits that employed the patented method, but it then decided to sell and market its own test, which was similar, but not identical.  Prometheus sued for patent infringement.  The district court found that Mayo’s test would infringe the Prometheus patents, but it then held the patents invalid as essentially claiming unpatentable laws of nature–in this case, the relationship between the levels of the specified metabolite and the efficacy or toxicity of the relevant drugs.


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Filed under General Interest, Genetic Testing/Screening, Genomics & Medicine, Industry News, Legal & Regulatory, Myriad Gene Patent Litigation, Pending Litigation