Patents by Inventor Hirofumi Li

Hirofumi Li 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).

  • High purity 1,6-hexanediol and process for preparing the same
    Patent number: 8513472
    Abstract: There is provided a process for preparing 1,6-hexanediol by esterifying a carboxylic acid mixture resulted from oxidation of cyclohexane with oxygen, and then hydrogenating the esters, which substantially does not contain a compound leading to a high ester value.
    Type: Grant
    Filed: October 19, 2009
    Date of Patent: August 20, 2013
    Assignee: Ube Industries, Ltd.
    Inventors: Hirofumi Li, Tomoyuki Itou, Yoshiki Kawamura, Toshiyuki Matsushita