Patents by Inventor Jujiro Kouno

Jujiro Kouno 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 producing microcapsules
    Patent number: 4010038
    Abstract: In a process for producing microcapsules of complex hydrophilic colloid material enclosing fine particles of a hydrophobic substance, the improvement characterized in that:An acid-treated gelatin and at least one of carboxy-modified cellulose derivatives are used as the hydrophilic colloid materials, the amount of the cellulose derivative being 1/7 to 1/40 the amount of the gelatin by weight, the cellulose derivative having an average polymerization degree of 50 to 1,000 and a carboxyl substitution degree of 0.4 to 1.5, andThe coacervation of the colloid material solution is effected at a pH of 4.8 to 6.0.
    Type: Grant
    Filed: April 1, 1975
    Date of Patent: March 1, 1977
    Assignee: Kanzaki Paper Manufacturing Co., Ltd.
    Inventors: Hiroshi Iwasaki, Shunsuke Shioi, Jujiro Kouno