Kymab announces that the US Patent Trial and Appeal Board rejects requests for invalidation filed by Regeneron

USPTO upholds 4 Kymab patents covering Human Antibodies and Platforms

Cambridge, UK: 14 April 2020: Kymab, a clinical-stage biopharmaceutical company developing fully human monoclonal antibody therapeutics, announces that Regeneron Pharmaceuticals Inc (“Regeneron”) has been unsuccessful in recent attempts to invalidate four of Kymab’s US patents covering genetically modified mice and the human antibody therapeutics produced from these mice. The patents are US patent numbers 9,434,782; 9,505,827; 9,447,177; and 10,165,763 known as the “Bradley Patents”. Equivalent patents have been granted by the European Patent Office and in other jurisdictions including Japan. Regeneron had filed oppositions against the Japanese Bradley patents, but these were upheld in unappealable decisions by the Japanese Patent Office.