Patents by Inventor Yasuyoshi Kawato

Yasuyoshi Kawato 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).

  • Lipid membrane structures
    Patent number: 5141751
    Abstract: Lipid membrane structures containing, in the lipid membrane thereof, a compound represented by formula (I): ##STR1## wherein R.sub.1 represents a hydrogen atom or a fatty acid residue; R.sub.2 represents a hydrogen atom or an acyclic hydrocarbon residue; R.sub.3 represents an amino group, a guanidino group or an amidino group; and n represents an integer of from 1 to 6; provided that R.sub.1 and R.sub.2 do not represent hydrogen atoms at the same time, or a salt thereof. The lipid membrane structures exhibit excellent specific affinity for tumor cells and can be delivered preferentially to tumor cells.
    Type: Grant
    Filed: March 4, 1991
    Date of Patent: August 25, 1992
    Assignee: Daiichi Pharmaceutical Co., Ltd.
    Inventors: Munehiro Tomikawa, Sadao Hirota, Hitoshi Yamauchi, Hiroshi Kikuchi, Yasuyoshi Kawato