Patents Assigned to Biomaterials Universe Incorporated
  • Polylactic acid microspheres and process for producing the same
    Patent number: 4994281
    Abstract: Polylactic acid microspheres having an average particle diameter of about 0.1 to 10 .mu.m which are produced from solution containing a physiologically active substance by the solvent-evaporation drying process. The microspheres are produced by emulsifying the solution in a non-solvent by the aid of ultrasonic wave. The microspheres produce a sustained release effect of the physiologically active substance.
    Type: Grant
    Filed: November 10, 1987
    Date of Patent: February 19, 1991
    Assignees: Sanraku Incorporated, Biomaterials Universe Incorporated
    Inventors: Shozo Muranishi, Yoshito Ikada, Hiroshi Yoshikawa, Shokyu Gen