Patents by Inventor Kimiko Miyata

Kimiko Miyata 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).

  • Polyvinyl alcohol based polymer and method of manufacturing the same
    Patent number: 7439300
    Abstract: The present invention provides polyvinyl alcohol based (PVA) whose solubility in water varies with a small temperature change to a sufficiently great degree. In manufacturing a polyvinyl alcohol based polymer by: progressing a transesterification reaction of a polyvinyl ester based polymer with alcohol in a liquid reaction mixture including the polyvinyl ester based polymer, the alcohol, and a basic compound; precipitating the polyvinyl ester based polymer, at least a part of which has been transesterified with the alcohol, out of the liquid reaction mixture; and further progressing the transesterification reaction in the liquid reaction mixture including the polyvinyl ester based polymer that has precipitated, the liquid reaction mixture has a temperature of 75° C. to 150° C. when the polyvinyl ester based polymer, at least a part of which has been transesterified, starts precipitating.
    Type: Grant
    Filed: September 10, 2004
    Date of Patent: October 21, 2008
    Assignee: Kuraray Co., Ltd.
    Inventors: Hisamichi Yanai, Yoshihiro Tokuda, Jin Tokuyasu, Kimiko Miyata, Naoki Fujiwara, Takeshi Kusudou
  • Polyvinyl alcohol based polymer and method of manufacturing the same
    Publication number: 20050059778
    Abstract: The present invention provides polyvinyl alcohol based (PVA) whose solubility in water varies with a small temperature change to a sufficiently great degree. In manufacturing a polyvinyl alcohol based polymer by: progressing a transesterification reaction of a polyvinyl ester based polymer with alcohol in a liquid reaction mixture including the polyvinyl ester based polymer, the alcohol, and a basic compound; precipitating the polyvinyl ester based polymer, at least a part of which has been transesterified with the alcohol, out of the liquid reaction mixture; and further progressing the transesterification reaction in the liquid reaction mixture including the polyvinyl ester based polymer that has precipitated, the liquid reaction mixture has a temperature of 75° C. to 150° C. when the polyvinyl ester based polymer, at least a part of which has been transesterified, starts precipitating.
    Type: Application
    Filed: September 10, 2004
    Publication date: March 17, 2005
    Applicant: Kuraray Co., Ltd.
    Inventors: Hisamichi Yanai, Yoshihiro Tokuda, Jin Tokuyasu, Kimiko Miyata, Naoki Fujiwara, Takeshi Kusudou