Patents Assigned to Horphag Research (UK) Limited
  • Cigarette filter with scavenging effect on free radicals in cigarette smoke and its preparation method
    Patent number: 6832612
    Abstract: A cigarette filter that has a scavenging effect on smoking induced gas phase free radicals. The filter ingredients are comprised of proanthocyanidins and include, but are not limited to, extracts of barks of pine tree, extracts of cones of cypress trees, extracts of grape seeds, and any combination thereof. Also, vitamin C and other known antioxidant ingredients may be added.
    Type: Grant
    Filed: September 25, 2001
    Date of Patent: December 21, 2004
    Assignee: Horphag Research (UK) Limited
    Inventors: Baolu Zhao, Peter Rohdewald, Jingnong (Charles) Li