In a lawsuit first filed in 2017 by Cocona Labs against The North Face (TNF) and Columbia Sportswear, a U.S. Court of Appeals for the Federal Circuit affirmed on March 4 the validity of key claims of one of Cocona’s patents on its 2.5L waterproof/breathable laminate technology. Registered on Feb. 3, 2015, the U.S. patent bears the number 8,945,287 B2covers a technology that mixes a base solution such as polyurethane with active particles that enhance the properties of a membrane or coating. Cocona, which is best known for its 37.5 fabric thermoregulation technology, sued both companies after they stopped purchasing its 2.5L materials from Cocona’s authorized suppliers, but continued to offer products that incorporated Cocona’s patented technology sourced from overseas. After litigating Cocona’s claims for nearly a year, TNF filed a petition with the Patent Trial and Appeal Board of the U.S. Patent and Trademark Office (PTAB), challenging the validity of the patent’s claims. TNF then appealed the PTAB’s adverse decision, leading to the March 4 court verdict, which now allows the original patent infringement suit to be reopened. Cocona had previously collaborated with TNF to develop performance fabrics with active particles. Cocona registered and owned the FlashDry name with its associated anti-moisture technology and transferred its ownership to TNF while the brand was one of its clients.