Justia Drugs & Biotech Opinion Summaries

Amgen holds an approved New Drug Application for Sensipar®, a formulation of cinacalcet hydrochloride used to treat secondary hyperparathyroidism in adult patients with chronic kidney disease who are on dialysis and to treat hypercalcemia in patients with parathyroid cancer and primary and secondary hyperparathyroidism. Amneal, Piramal, and Zydus each filed an Abbreviated New Drug Application (ANDA) seeking to enter the market with a generic version of Sensipar®. Amgen sued each ANDA filer, alleging that the proposed ANDA products would infringe its 405 patent, which is directed to a rapid dissolution formulation of cinacalcet. The district court entered a judgment of non-infringement. The Federal Circuit vacated in part, finding that the district court construed the claims incorrectly and erred in its analysis of infringement by Amneal. The court affirmed with respect to Piramal and Zydus, finding that the district court properly applied prosecution history estoppel to Amgen’s arguments regarding Piramal and otherwise did not err in its factual findings for Zydus. View "Amgen Inc. v. Amneal Pharmaceuticals LLC" on Justia Law

Persion’s 760 and 499 patents, both entitled “Treating Pain in Patients with Hepatic Impairment” share a common written description and priority date and are directed to methods of treating pain in patients with mild or moderate compromised liver functionality, using extended-release hydrocodone-only formulations. Hydrocodone is an opioid, widely used to treat pain, and has been FDA-approved since 1943. The patents cover the formulation for Zohydro ER.4. Persion sued, alleging that Alvogen infringed the patents by filing an Abbreviated New Drug Application seeking to market a generic version of Zohydro ER.4. The Federal Circuit affirmed a finding that the patents are invalid as obvious. The district court did not err by finding that the pharmacokinetic limitations of the asserted claims were inherent and added no patentable weight to the pharmacokinetic claims. Regardless of whether the court’s consideration of the FDA’s statement was proper, there was no clear error in the court’s finding that there was a motivation to combine prior art in light of the evidence as a whole. The district court considered Persion’s evidence of objective indicia together with the other evidence on the issue of obviousness and there is no inconsistency between the district court’s findings underlying its obviousness and lack of written description determinations. View "Persion Pharmaceuticals LLC v. Alvogen Malta Operations Ltd." on Justia Law

Syngenta sued Willowood, a Hong Kong company that sells fungicide to its Oregon-based affiliate, for infringement of patents directed to a fungicide compound and its manufacturing processes and infringement of copyrights for detailed product labels that provide directions for use, storage, and disposal, plus first-aid instructions and environmental, physical, and chemical hazard warnings. The district court dismissed the copyright claims as precluded by the Federal Insecticide Fungicide and Rodenticide Act (FIFRA), 7 U.S.C. 135 and granted-in-part Syngenta’s summary judgment motion with respect to patent infringement. After a jury trial, the court entered a defense judgment on the patent claims. The Federal Circuit affirmed-in-part, reversed-in-part, and vacated in part. The district court did not provide an adequate analysis of the potential conflict between FIFRA and the Copyright Act. Because FIFRA does not, on its face, require a “me-too” registrant to copy the label of a registered product, FIFRA only conflicts with the Copyright Act to the extent that some particular element of Syngenta’s label is both protected under copyright doctrines and necessary for the expedited approval of Willowood’s generic pesticide. The court erred by imposing a single-entity requirement on the performance of a patented process under 35 U.S.C. 271(g); practicing a patented process abroad does not trigger liability under section 271(g) in the same manner that practicing a patented process domestically does under section 271(a). View "Syngenta Crop Protection, LLC v. Willowood, LLC" on Justia Law

Amgen’s patents relate to erythropoietin (EPO) isoforms and aspects of their production. EPO is a glycoprotein hormone that regulates red blood cell maturation and production. Recombinant human EPO is an important therapeutic protein for the treatment of anemia. Amgen manufactures and markets recombinant human EPO as Epogen. Hospira submitted its Biologics License Application (BLA) to the FDA, seeking approval for a biosimilar to Amgen’s Epogen product. Amgen sued Hospira for infringement under 35 U.S.C. 271(a) and 271(e)(2)(C). A jury found the asserted claims not invalid and infringed. Of the 21 accused drug substance batches, the jury found seven batches entitled to the Safe Harbor defense. The jury awarded Amgen $70 million in damages. The Federal Circuit affirmed, upholding the district court’s claim construction and finding substantial evidence of infringement. Section 271(e)(1) carves out a "Safe Harbor” exception to patent infringement liability when otherwise-infringing activities are solely for uses reasonably related to obtaining FDA approval. Substantial evidence supports the jury’s finding that the 14 batches at issue were not manufactured “solely for uses reasonably related to the development and submission of information” to the FDA. View "Amgen Inc. v. Hospira, Inc." on Justia Law

Pharma Tech sued LifeScan for infringement of two patents that concern blood glucose monitoring systems for home use by individuals with diabetes. The shared specification of Pharma Tech’s patents states that the claimed inventions improve on prior art blood glucose monitoring systems by “eliminat[ing] several of the critical operator depend[e]nt variables that adversely affect the accuracy and reliability” of these systems. The specification explains that the invention accomplishes this objective by performing multiple Cottrell current measurements and comparing the results. “In a system that is operating correctly, the results should agree within reasonable limits.” The Federal Circuit affirmed summary judgment of noninfringement. Pharma Tech agreed that the accused products do not literally infringe the claim. Prosecution history estoppel bars the claims for infringement under the doctrine of equivalents; the accused system falls within the claim scope surrendered by the inventors during prosecution of the patent. View "Pharma Tech Solutions, Inc. v. LifeScan, Inc." on Justia Law

Index and Gilead were developing drugs for treating the hepatitis C virus (HCV). Idenix alleged that the imminent FDA approval, and launch, of Gilead’s HCV treatment drug sofosbuvir would infringe Idenix’s 597 patent. After a jury trial, Gilead stipulated to infringement under the district court’s claim construction but argued that the patent was invalid for failure to meet the written description and enablement requirements. The jury found for Idenix, upheld the patent and awarded damages. The district court denied Gilead’s motion with respect to written description but granted judgment as a matter of law on enablement, holding the 597 patent invalid. The Federal Circuit affirmed as to non-enablement and held that the patent is also invalid for lack of written description. Although the level of skill in the art is high, the patent does not provide enough meaningful guidance or working examples, across the full scope of the claim, to allow a person of ordinary skill in the art to determine which nucleosides would be effective against HCV without extensive screening. The immense breadth of screening required amounts to "undue experimentation." Given the conspicuous absence of that compound, a person of ordinary skill in the art would not “visualize or recognize the members of the genus” as including 2'-fluoro-down, and the specification could not demonstrate that the inventor had possession of that embodiment at the time of filing. View "Idenix Pharmaceuticals LLC v. Gilead Sciences Inc." on Justia Law

Horizon’s patents generally relate to methods and compositions for treating osteoarthritis and share a substantially similar specification; there are method-of-use patents and formulation patents. Both groups of patents are listed in the FDA Approved Drug Products with Therapeutic Equivalence Evaluations (Orange Book) for Horizon’s PENNSAID® 2% product, a nonsteroidal anti-inflammatory drug (NSAID) and the first FDA-approved twice-daily topical diclofenac sodium formulation for the treatment of pain of osteoarthritis of the knees. Prior art, PENNSAID® 1.5%, also treats osteoarthritis knee pain but differs from PENNSAID® 2% both in the formulation and recommended dosage. Actavis sought to market a generic version of PENNSAID 2% and filed an Abbreviated New Drug Application (ANDA) with certification under 21 U.S.C. 355(j)(2)(A)(vii)(IV), stating that the patents-at-issue were invalid or would not be infringed by Actavis’s generic product. Horizon filed an infringement suit under 35 U.S.C. 271(e)(2)(A). The Federal Circuit affirmed findings of invalidity and noninfringement, upholding claim construction that the terms “impurity A”; “degrades at less than 1% over 6 months”; and “consisting essentially of” are indefinite. Actavis’s ANDA label did not induce infringement of the method-of-use patent. View "HZNP Medicines LLC v. Actavis Laboratories UT, Inc." on Justia Law

Non-small cell lung cancer (NSCLC) was the leading cause of cancer deaths in 2000. The standard for treating NSCLC was chemotherapy, which ameliorated some lung cancer-related symptoms, but was limited in use due to toxicity. In response to a need for a therapy that would effective and well-tolerated, investigators pursued targeted therapies as alternatives to chemotherapy. A great majority of alternative therapies for NSCLC failed in clinical trials. One compound that ultimately gained FDA approval was erlotinib. OSI markets erlotinib under the name Tarceva®, which is covered by the 221 patent, which issued in 2005. On inter partes review, the Patent Board found certain claims unpatentable under 35 U.S.C. 103, in light of prior art and the 10-K disclosure filed by OSI with the Securities and Exchange Commission. The Federal Circuit reversed. Substantial evidence did not support the Board’s finding that the asserted combinations of prior art or prior art and the 10-K disclosures each would have provided a person of ordinary skill with a reasonable expectation of success in using erlotinib to treat NSCLC in a mammal. View "OSI Pharmaceuticals, LLC v. Apotex Inc" on Justia Law

Allergan’s patents, entitled “Combination of Brimonidine and Timolol for Topical Ophthalmic Use,” the Patents-in-Suit share a common specification that relates “to the topical ophthalmic use of brimonidine in combination with timolol . . . for treatment of glaucoma or ocular hypertension.” Allergan sued Sandoz, asserting that Sandoz’s Abbreviated New Drug Application (ANDA) for a generic version of Allergan’s ophthalmic drug Combigan® infringed those patents. The district court granted Allergan a preliminary injunction. The Federal Circuit affirmed, limiting a number of “wherein” clauses in the patents. Both Allergan and the Examiner explicitly relied on the “wherein” clauses to distinguish the claimed methods over the prior art during prosecution. The “wherein” clauses were neither unnecessary nor irrelevant. View "Allergan Sales, LLC v. Sandoz, Inc." on Justia Law

Arthrex’s 541 patent describes a surgical suture anchor used to reattach soft tissue to bone. The disclosed “fully threaded suture anchor” includes “an eyelet shield that is molded into the distal part of the biodegradable suture anchor.” In an inter partes review, the Patent Trial and Appeal Board ruled two claims invalid. In doing so, the Board employed different language than Smith & Nephew, Inc.’s petition to explain why a person of ordinary skill in the art would have been motivated to combine the teachings of the prior art. The Federal Circuit affirmed. The Board’s minor variation in wording does not violate the safeguards of the Administrative Procedure Act and did not deprive Arthrex of an opportunity to be heard. The Board’s findings have substantial evidence support, its claim constructions are correct, and Arthrex has not articulated a cognizable constitutional challenge to inter partes review for its patent. View "Arthrex, Inc. v. Smith & Nephew, Inc." on Justia Law