Patents Examined by A. Cannon
  • Polymethylmethacrylate bone cements and methods for preparing such bone cements
    Patent number: 4554686
    Abstract: The present invention is directed to polymethylmethacrylate bone cement that is premixed and frozen so as to arrest the polymerization reaction at a suitable point. The frozen bone cement is treated by electromagnetic radiation to insure sterility. In use, the bone cement is warmed until it reaches a temperature and consistency suitable for use. The bone cement may be prepackaged in a syringe, or may be molded for use in connection with a particular prosthesis, or may be packaged unitarily with a prosthesis.
    Type: Grant
    Filed: February 29, 1984
    Date of Patent: November 26, 1985
    Assignee: Technical Research Associates, Inc.
    Inventor: Charles D. Baker