Patents by Inventor Katsumi Iga

Katsumi Iga 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).

  • Method of producing liposome
    Patent number: 4877561
    Abstract: Liposomes with an increased drug trap can be prepared by adding a readily volatile organic solvent to a drug-containing liquid with liposomes dispersed therein to cause gel formation and then removing said organic solvent by evaporation.
    Type: Grant
    Filed: April 2, 1987
    Date of Patent: October 31, 1989
    Assignee: Takeda Chemical Industries, Ltd.
    Inventors: Katsumi Iga, Naoru Hamaguchi, Yasuaki Ogawa
  • Liposome composition
    Patent number: 4844904
    Abstract: Liposome compositions in which a drug is retained in stable condition are prepared by dispersing liposomes obtained by removal of a solvent from a drug-containing w/o emulsion in an aqueous solution having an osmotic pressure higher by at least 20 percent than the osmotic pressure of a solution used for entrapping the drug in said liposomes. This composition is conducive to a sustained therapeutic efficacy or a better delivery of the drug to a target organ.
    Type: Grant
    Filed: November 21, 1986
    Date of Patent: July 4, 1989
    Assignee: Takeda Chemical Industries, Ltd.
    Inventors: Naoru Hamaguchi, Katsumi Iga, Yasuaki Ogawa