Patents by Inventor Rieko Oba

Rieko Oba 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).

  • Soil improvement agent composition
    Patent number: 9290696
    Abstract: The invention provides a soil improvement agent composition which contains (A) a fatty acid polyoxyalkylene alkyl ether represented by formula (1): R1CO (EO)m (PO)n OR2 (1) wherein R1 is a straight-chain or branched hydrocarbon group having 13 to 21 carbon atoms, EO represents ethylene oxide, m is a number of 2 to 10, PO represents propylene oxide, n is a number of 1 to 4, and R2 is a hydrocarbon group having 1 to 3 carbon atoms; and (B) a polyoxyalkylene alkyl ether represented by formula (2): R3O (EO)x (PO)y H (2) wherein R3 is a straight-chain or branched hydrocarbon group having 8 to 14 carbon atoms, EO represents ethylene oxide, x is a number of 7 to 12, PO represents propylene oxide, and y is a number of 0 to 3.
    Type: Grant
    Filed: November 10, 2011
    Date of Patent: March 22, 2016
    Assignee: LION SPECIALTY CHEMICALS CO., LTD.
    Inventors: Ken Yamada, Hiroyuki Izumoto, Rieko Oba, Takaaki Kano, Minako Matoba
  • SOIL IMPROVEMENT AGENT COMPOSITION
    Publication number: 20130221270
    Abstract: The invention provides a soil improvement agent composition which contains (A) a fatty acid polyoxyalkylene alkyl ether represented by formula (1): R1CO (EO)m (PO)n OR2 (1) wherein R1 is a straight-chain or branched hydrocarbon group having 13 to 21 carbon atoms, EO represents ethylene oxide, m is a number of 2 to 10, PO represents propylene oxide, n is a number of 1 to 4, and R2 is a hydrocarbon group having 1 to 3 carbon atoms; and (B) a polyoxyalkylene alkyl ether represented by formula (2): R3O (EO)x (PO)y H (2) wherein R3 is a straight-chain or branched hydrocarbon group having 8 to 14 carbon atoms, EO represents ethylene oxide, x is a number of 7 to 12, PO represents propylene oxide, and y is a number of 0 to 3.
    Type: Application
    Filed: November 10, 2011
    Publication date: August 29, 2013
    Applicant: LION CORPORATION
    Inventors: Ken Yamada, Hiroyuki Izumoto, Rieko Oba, Takaaki Kano, Minako Matoba