non-Orange Book-listed patent (Patent No. 8,652,497). The lawsuit was initiated in response to the Company filing the New Drug Application (“NDA”) for Xtampza ER as a 505(b)(2) application referencing data from Purdue’s OxyContin NDA, and under the Drug Price Competition and Patent Term Restoration Act of 1984, triggered a stay of up to 30 months before the FDA could issue a final approval for Xtampza ER, unless the stay was earlier terminated.
The Delaware court transferred the case to the District of Massachusetts. After the Company filed a partial motion for judgment on the pleadings relating to the Orange Book-listed patents, the District Court of Massachusetts ordered judgment in the Company’s favor on those three patents, and dismissed the claims which lifted the 30-month stay of FDA approval. Following this judgment, the Company obtained final approval for Xtampza ER and launched commercially.
Purdue subsequently filed two follow-on lawsuits asserting infringement of two patents that had been late-listed in the Orange Book and, therefore, could not trigger any stay of FDA approval: Purdue asserted infringement of Patent No. 9,073,933 in November 2015 and Patent No. 9,522,919 in April 2017. In addition, Purdue invoked two non-Orange Book-listed patents, filing suit in June 2016 asserting infringement of Patent No. 9,155,717 and in September 2017, asserting infringement of Patent No. 9,693,961.
On March 13, 2018, the Company filed a Petition for Post-Grant Review (“PGR”) of the ʼ961 patent with the Patent Trial and Appeal Board (“PTAB”). The PGR argued that the ʼ961 patent is invalid.
On November 21, 2017, the Court issued its claim construction ruling, construing certain claims of the ʼ933, ʼ497, and ʼ717 patents. The Court issued an order on September 28, 2018, in which it ruled that the Xtampza ER formulation does not infringe the ʼ497 and ʼ717 patents.
On September 15, 2019, Purdue commenced chapter 11 bankruptcy proceedings in the United States Bankruptcy Court for the Southern District of New York. Later in September 2019, Purdue gave the District Court of Massachusetts, as well as the PTAB, notice of its bankruptcy filing and sought the imposition of an automatic stay of proceedings. Both the Court and the PTAB granted Purdue’s requests to stay the pending matters.
On September 1, 2020, the Bankruptcy Court entered an Order, lifting the automatic stays in both the District of Massachusetts and PTAB proceedings. On September 11, 2020, Purdue filed a motion to terminate the PTAB action on the basis that those proceedings had gone beyond the 18-month statutory period. On November 19, 2021, the PTAB: (i) denied Purdue’s motion to terminate the PGR; and (ii) issued its Final Written Decision, finding that the asserted claims of the ʼ961 patent were invalid for lack of written description and anticipation. Purdue appealed the decision to the Federal Circuit, which issued its decision on November 21, 2023, affirming the authority of the PTAB to issue its Final Written Decision and upholding the PTAB’s finding of invalidity relative to the ’961 patent. Purdue has exhausted all possibility of appeal, and the judgment of invalidity of the ’961 patent is final without further right of appeal.
On April 2, 2021, the Court granted Purdue’s Motion to Lift the Stay in the District of Massachusetts that was entered following Purdue’s Notice of Bankruptcy. On April 9, 2021, Purdue filed another follow-on lawsuit asserting infringement of U.S. Patent No. 10,407,434. The Company responded to Purdue’s complaint with a motion to dismiss. On May 21, 2021, and in response to the Company’s motion to dismiss, Purdue filed an amended complaint. The Company renewed its motion to dismiss on June 4, 2021, arguing: (i) Purdue cannot, as a matter of law, state a claim for infringement under § 271(e)(2)(A); (ii) Purdue cannot, as a matter of law, state a claim for product-by-process infringement under §271(g); and (iii) Purdue has not alleged facts sufficient to support any indirect infringement theory under §271(b) or (c). The Court held a hearing on the Company’s motion to dismiss on October 13, 2021, and the motion is pending before the Court.
Like the prior follow-on lawsuits, the ’434 patent litigation was consolidated into the lead case and a scheduling order was entered. On May 15, 2023, the Court issued an order that: (i) vacated the existing deadlines with respect to the ʼ933, ʼ919, and ʼ434 patents and stayed the case pending the Federal Circuit’s decision in a different litigation that invalidated certain claims of the ʼ933 and ʼ919 patents; and (ii) continued the existing stay concerning the ʼ961 patent pending resolution of Purdue’s appeal rights relating to the decision invalidating the claims of the ʼ961 patent. The Court has not set a deadline for dispositive motions or trial.
The remaining patents-in-suit in the lead consolidated action in the District of Massachusetts are the ʼ933, ʼ919, ʼ434, and ʼ961 patents. Purdue has made a demand for monetary relief, and requested a judgment of infringement, an