Patent Law

Ignoring Non-Patentable Elements While Judging Novelty

By Dennis Crouch

By Dennis Crouch

The Federal Circuit offers some clues to its post-Bilski patentable-subject-matter jurisprudence, but leaves that fight for another day.  Instead, the court held the claims anticipated by explicitly ignoring novel claim elements.

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King Pharmaceuticals, Inc. v. Eon Labs, Inc. and Elan Pharmaceuticals, Inc. (Fed. Cir. 2010)

King's patent claims a method of increasing oral bioavailability of the muscle relaxant metaxalone by putting metaxalone in food eaten by the patient. Claim 21 includes a step of 'informing the patient that the administration [of the drug with food] results in an increase [in absorption].  This step likely has two benefits: (1) increasing patient compliance with the drug regimen and (2) taking advantage of any placebo effect that may exist.  The drug metaxalone itself was already a known muscle relaxant well prior to King's 2001 application date.

Patenting Methods of Treatment: The district court held claim 21 invalid under 35 U.S.C. 101 based on the Federal Circuit's machine-or-transformation test from Bilski. On appeal, the Federal Circuit rejected the lower court analysis — noting that when examined 'as a whole', the claim requires treatment and 'methods of treatments ‘are always transformative when a defined group of drugs is administered to the body to ameliorate the effects of an undesired condition.'' (quoting Prometheus Labs., Inc. v. Mayo Collaborative Serv., 581 F.3d 1336, 1346 (Fed. Cir. 2009), cert. granted and vacated, 78 U.S.L.W. 3254 (U.S. June 29, 2010)).

Although the appellate panel rejected the lower court's Section 101 analysis, it stopped short of providing any positive position on the patentability of medical treatment methods — presumably saving that battle for the pending remands of Prometheus and Classen. 

Instead, the appellate court held that a Section 101 decision was not necessary because the claims of interest are anticipated under Section 102.

Ignoring Non-Patentable Elements: Here, the novelty question is interesting because the 'informing' step was not specifically identified in the prior art. On appeal, the Federal Circuit held that claiming a step of 'informing someone about the existence of an inherent property' of a method cannot render the claim patentable. '[I]n light of our holding that the method of taking metaxalone with food to increase the drug's bioavailability, as recited in claim 1, is not patentable, it readily follows that claim 21, which recites the same method with the sole additional step of informing the patient about this increase in bioavailability, is not patentable.' 

In its decision, the court ties its case to the precedential foundation of 'printed matter' cases that have barred the patentability of known products by the inclusion of printed matter describing the product.

In some ways, this decision may be seen as reviving the suggestion found in the now vacated 2007 In re Comiskey decision. There, the court suggested that, during nonobviousness analysis, any portion of an invention that constitutes nonstatutory subject matter will be considered de facto obvious.

Panel: Judges Bryson, Gajarsa, and Prost. Authored by Judge Gajarsa. 

Full post as published by Patently Obvious on August 02, 2010 (boomark / email).