US Patent Issued to FRESENIUS MEDICAL CARE HOLDINGS on Nov. 25 for "Extracorporeal device and method for removal of secondary membrane" (California Inventors)

ALEXANDRIA, Va., Nov. 25 -- United States Patent no. 12,478,717, issued on Nov. 25, was assigned to FRESENIUS MEDICAL CARE HOLDINGS INC. (Waltham, Mass.).

"Extracorporeal device and method for removal of secondary membrane" was invented by Matthew Doyle (Martinez, Calif.) and Robert Anthony Zimmerman (Milbrae, Calif.).

According to the abstract* released by the U.S. Patent & Trademark Office: "An extracorporeal blood treatment device and a method are provided for removing a secondary membrane formed on a semipermeable membrane of a dialyzer during an extracorporeal blood treatment. The extracorporeal blood treatment device operates in a first operating mode in which a dialysate outlet valve is open such that dialysate flows through a dial...