Patents by Inventor Hiromitsu Seike

Hiromitsu Seike 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).

  • Cationic surfactants, process for producing the same and utilization thereof
    Patent number: 6359176
    Abstract: The present invention provides cationic surfactants derived from the amino derivatives of hexose alcohol, a reduced alcohol of hexose or reduced sugar of glucose, which is produced by converting 1-amino-hexose alcohol into a quaternary salt and by esterifying with fatty acid. The cationic surfactants have superior biodegradability.
    Type: Grant
    Filed: July 6, 2000
    Date of Patent: March 19, 2002
    Assignees: Matsumoto Yushi-Seiyaku Co., Ltd., Saka City Government
    Inventors: Masaki Nakamura, Jia-he Qian, Hiromitsu Seike, Takeshi Munekiyo
  • Double-chain type sulfated compounds having acid degradability and process for producing the same
    Patent number: 5817839
    Abstract: Described herein are sulfated compounds represented by the formula (I): ##STR1## wherein X respectively represent --OSO.sub.3 M or a hydroxyl group and at least one of X represents --OSO.sub.3 M, a process for producing the sulfated compounds and a process for decomposing the sulfated compounds in an aqueous acid solution.
    Type: Grant
    Filed: November 28, 1997
    Date of Patent: October 6, 1998
    Assignees: Matsumoto Yushi-Seiyaku Co., Ltd., Osaka Municipal Government
    Inventors: Masaki Nakamura, Daisuke Ono, Jia-he Qian, Hiromitsu Seike, Shigeo Mizutani, Takeshi Munekiyo