Patents by Inventor Harumi Hashimoto

Harumi Hashimoto 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).

  • Indicator for detection of thermal history
    Patent number: 4675161
    Abstract: An indicator comprising azo dye(s), epoxy compound(s) and a separating membrane can be utilized for detection of the completion of thermal sterilization treatment in the medical field and also for thermal inspection in such various fields as testing, instrumentation and the like. The indicator can be used also for detection of the completion of alkylene oxide gas sterilization treatment by ethylene oxide gas or the like.
    Type: Grant
    Filed: December 29, 1983
    Date of Patent: June 23, 1987
    Assignee: Sakata Shokai, Ltd.
    Inventors: Harumi Hashimoto, Isamu Hirano