Section 287(c) of the Patent Act provides that, in certain circumstances, a medical practitioner whose actions would ordinarily constitute patent infringement is immune from suit when performing a “medical activity.” Recently, in VetStem Biopharma, Inc. v. Cal. Stem Cell Treatment Ctr., Inc., No. 2:19-cv-04728, slip op. (C.D. Cal., Oct. 31, 2019), the court analyzed this defense and found that the defendant was not immune from infringement.

VetStem sued California Stem Cell Treatment Center for infringement of U.S. Pat. No. 9,453,202, (hereafter “the ’202 patent”), which covers treatments employing adipose-derived stem cells in both human and veterinary settings. The defendant responded by filing a motion to dismiss under Rule 12(b)(6), claiming immunity under Section 287(c) because any alleged infringement resulted from medical practitioners performing a “medical activity.” 

The court requested supplemental briefing to address several issues, including whether the ’202 patent is a “biotechnology patent.” VetStem, No. 2:19-cv-04728 (C.D. Cal., Oct. 16, 2019) (In chambers order requesting supplemental briefing).  Section 287(c) does not provide immunity where the “medical activity” is “the practice of a process in violation of a biotechnology patent.”  35 U.S.C. § 287(c)(2)(A).

The term “biotechnology patent” is not defined in Section 287(c). VetStem, No. 2:19-cv-04728, slip op. at 3 (C.D. Cal., Oct. 31, 2019). Instead, the House Conference Report accompanying the statute provides that a “biotechnology patent” includes, among other things, a patent covering a treatment using biological materials wherein those materials were manipulated (such as by selection and purification) outside of the body. Id. at 3–4 (citing H.R. Rep. No. 104-863, at 854 (1996) (Conf. Rep.)).

The court in VetStem concluded without any claim construction that the ’202 patent was a “biotechnology patent.” Id. at 5. It found that Claim 1 was directed to a treatment using adipose-derived stem cells that were manipulated (by processing and separation) outside of the body. Id. Thus, the alleged infringing activity was “the practice of a process in violation of a biotechnology patent” and therefore not a medical activity immune from infringement under Section 287(c). Id.

VetStem serves to remind us that Section 287(c) immunity provides only a limited immunity for medical practitioners.