Patents by Inventor Yongming Liu

Yongming Liu has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Sealing Members, Articles Using the Same and Methods of Reducing Sticktion
    Publication number: 20070228669
    Abstract: The present invention provides rubber sealing members having an exterior surface adapted to sealingly engage an inner surface of a chamber of the medical device, the exterior surface of the sealing member having a coating thereon prepared from a curable composition including: (a) a first organopolysiloxane having at least two alkenyl groups; and (b) a second organopolysiloxane having at least two pendant hydrogen groups, the second organopolysiloxane being different from the first organopolysiloxane, wherein at least one of the first organopolysiloxane, the second organopolysiloxane or an optional third organopolysiloxane of the curable composition comprises a fluoro group.
    Type: Application
    Filed: March 29, 2007
    Publication date: October 4, 2007
    Applicant: BECTON, DICKINSON AND COMPANY
    Inventors: Yongming Liu, Xia Zhao
  • Hydroxyfluoroalkyl-substituted styrenes and polymeric compositions containing same
    Patent number: 5352742
    Abstract: Fluorinated styrenes of the formula I: ##STR1## where R.sub.1 is a C.sub.1 -C.sub.6 alkyl and R.sub.2 is the repeating unit ##STR2## where x is zero or any positive integer, which are useful as compatibilizing and toughening agents for various polymers such as styrene, dienes (butadiene, isoprene, etc.) acrylates, polymethacrylates, polycarbonates, polyesters, polyamides, etc. Particularly preferred are p-(1,1,1,3,3,3-hexafluoro-2-hydroxy isopropyl)-.alpha.-methylstyrene, polymers thereof, block and random copolymers thereof and polymer blends incorporating the same.
    Type: Grant
    Filed: December 7, 1993
    Date of Patent: October 4, 1994
    Assignee: The United States of America as represented by the Secretary of Commerce
    Inventors: Charles C. Han, Manjun He, Yongming Liu, Yi Feng, Ming Jiang
  • Hydroxyfluoroalkyl-substituted styrenes and polymeric compositions containing same
    Patent number: 5272232
    Abstract: Fluorinated styrenes of the formula I: ##STR1## where R.sub.1 is a C.sub.1 -C.sub.6 alkyl and R.sub.2 is the repeating unit ##STR2## where x is zero or any positive integer, which are useful as compatibilizing and toughening agents for various polymers such as styrene, dienes (butadiene, isoprene, etc.) acrylates, polymethacrylates, polycarbonates, polyesters, polyamides, etc. Particularly preferred are p-(1,1,1,3,3,3-hexafluoro-2-hydroxy isopropyl)-.alpha.-methylstyrene, polymers thereof, block and random copolymers thereof and polymer blends incorporating the same.
    Type: Grant
    Filed: December 4, 1992
    Date of Patent: December 21, 1993
    Assignee: The United States of America as represented by the Secretary of Commerce
    Inventors: Charles C. Han, Manjun He, Yongming Liu, Yi Feng, Ming Jiang
  • Hydroxyfluoroalkyl-substituted styrenes and polymeric compositions containing same
    Patent number: 5241007
    Abstract: Fluorinated styrenes of the formula I; ##STR1## where R.sub.1 is a C.sub.1 -C.sub.6 alkyl and R.sub.2 is the repeating unit ##STR2## where x is zero or any positive integer, which are useful as compatibilizing and toughening agents for various polymers such as styrene, dienes (butadiene, isoprene, etc.) acrylates, polymethacrylates, polycarbonates, polyesters, polyamides, etc. Particularly preferred are p-(1,1,1,3,3,3-hexafluoro-2-hydroxy isopropyl)-.alpha.-methylstyrene, polymers thereof, block and random copolymers thereof and polymer blends incorporating the same.
    Type: Grant
    Filed: January 21, 1992
    Date of Patent: August 31, 1993
    Assignee: The United Statets of America as represented by the Secretary of Commerce
    Inventors: Charles C. Han, Manjun He, Yongming Liu, Yi Feng, Ming Jiang