Patents by Inventor Miyuki Hirayama

Miyuki Hirayama 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).

  • Cooling pack
    Patent number: 5031418
    Abstract: A cooling pack comprises at least one coolant carrier (10) for keeping coolant held thereon and a container (11) adapted to enclose the coolant carrier (10). The coolant carrier (10) consists of liquid absorbent substrate (12) and liquid absorbent polymer particles (13). The container (11) has at least a pair of flat layers opposed to each other which are adapted to introduce liquid into the container (11). The cooling pack can provide beneficial features such as to avoid exudation of liquid absorbent polymer particles (13), to introduce liquid into the container (11) in a short period of time, and to obtain non-sticking of the container (11) refrigerated condition.
    Type: Grant
    Filed: July 3, 1989
    Date of Patent: July 16, 1991
    Assignee: Uni-Charm Corporation
    Inventors: Miyuki Hirayama, Eiji Umemura, Masatoshi Fujiwara, Hiroyuki Inagaki