Patents by Inventor William Gerald DiMaio, Jr.

William Gerald DiMaio, Jr. 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).

  • Process for medical implant of cross-linked ultrahigh molecular weight polyethylene having improved balance of wear properties and oxidation resistance
    Patent number: 6316158
    Abstract: A medical implant of ultrahigh molecular weight polyethylene having an improved balance of wear properties and oxidation resistance is prepared by irradiating a preform of ultrahigh molecular weight polyethylene, annealing the irradiated preform in the absence of oxygen to a temperature at or above the onset of melting temperature, and forming an implant from the stabilized cross-linked polymer. Implants prepared according to the process of the present invention have comparable oxidation resistance and superior wear performance compared to unirradiated ultrahigh molecular weight polyethylene.
    Type: Grant
    Filed: October 16, 2000
    Date of Patent: November 13, 2001
    Assignee: DePuy Orthopaedics, Inc.
    Inventors: Kenneth Ashley Saum, William Michael Sanford, William Gerald DiMaio, Jr., Edward George Howard, Jr.
  • Process for medical implant of cross-linked ultrahigh molecular weight polyethylene having improved balance of wear properties and oxidation resistance
    Patent number: 6242507
    Abstract: A medical implant of ultrahigh molecular weight polyethylene having an improved balance of wear properties and oxidation resistance is prepared by irradiating a preform of ultrahigh molecular weight polyethylene, annealing the irradiated preform in the absence of oxygen to a temperature at or above the onset of melting temperature, and forming an implant from the stabilized cross-linked polymer. Implants prepared according to the process of the present invention have comparable oxidation resistance and superior wear performance compared to unirradiated ultrahigh molecular weight polyethylene.
    Type: Grant
    Filed: October 22, 1999
    Date of Patent: June 5, 2001
    Assignee: Depuy Orthopaedics, Inc.
    Inventors: Kenneth Ashley Saum, William Michael Sanford, William Gerald DiMaio, Jr., Edward George Howard, Jr.
  • Process for medical implant of cross-linked ultrahigh molecular weight polyethylene having improved balance of wear properties and oxidation resistance
    Patent number: 6017975
    Abstract: A medical implant of ultrahigh molecular weight polyethylene having an improved balance of wear properties and oxidation resistance is prepared by irradiating a preform of ultrahigh molecular weight polyethylene, annealing the irradiated preform in the absence of oxygen to a temperature at or above the onset of melting temperature, and forming an implant from the stabilized cross-linked polymer. Implants prepared according to the process of the present invention have comparable oxidation resistance and superior wear performance compared to unirradiated ultrahigh molecular weight polyethylene.
    Type: Grant
    Filed: August 15, 1997
    Date of Patent: January 25, 2000
    Inventors: Kenneth Ashley Saum, William Michael Sanford, William Gerald Dimaio, Jr., Edward George Howard, Jr.