Patents by Inventor Akinobu Ichihara

Akinobu Ichihara 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).

  • Surfactant
    Patent number: 5332854
    Abstract: The surfactant of this invention is a compound of general formula (I) ##STR1## wherein R.sub.1 is an alkyl, alkenyl or aralkyl group containing 6 to 18 carbon atoms; R.sub.2 is a hydrogen atom or an alkyl, alkenyl or aralkyl group containing 6 to 18 carbon atoms; R.sub.3 is a hydrogen atom or a propenyl group; A is an unsubstituted or substituted alkylene group of 2 to 4 carbon atoms; n is an integer of 1 to 200; M means an alkali metal, an ammonium ion or an alkanolamine residue.
    Type: Grant
    Filed: July 26, 1993
    Date of Patent: July 26, 1994
    Assignee: Dai-Ichi Kogyo Seiyaku Co., Ltd.
    Inventors: Kinya Yokota, Akinobu Ichihara, Hitoshi Shinike
  • Surfactant
    Patent number: 5324862
    Abstract: The surfactant of this invention is a compound of general formula (I) ##STR1## wherein R.sub.1 is an alkyl, alkenyl or aralkyl group containing 6 to 18 carbon atoms; R.sub.2 is a hydrogen atom or an alkyl, alkenyl or aralkyl group containing 6 to 18 carbon atoms; R.sub.3 is a hydrogen atom or a propenyl group; A is an alkylene group of 2 to 4 carbon atoms; n is an integer of 1 to 200.
    Type: Grant
    Filed: February 18, 1993
    Date of Patent: June 28, 1994
    Assignee: Dai-Ichi Kogyo Seiyaku Co., Ltd.
    Inventors: Kinya Yokota, Akinobu Ichihara, Hitoshi Shinike
  • Surface active compounds having a polymerizable moiety
    Patent number: 4939283
    Abstract: Novel surfactants of the formula: ##STR1## wherein R.sub.1 is alkyl, alkenyl, alkylaryl or aralkylaryl of 8-30 carbon atoms,A is alkylene of 2-4 carbon atoms,x is 0, or 1-100 andy is 1-200.Sulfates, phosphates and sulfosuccinates thereof are also useful as anionic surfactants.
    Type: Grant
    Filed: December 15, 1988
    Date of Patent: July 3, 1990
    Assignee: Dai-Ichi Kogyo Seiyaku Co., Ltd.
    Inventors: Kinya Yokota, Akinobu Ichihara
  • Surface active compounds having a polymerizable moiety
    Patent number: 4918211
    Abstract: Novel surfactants of the formula: ##STR1## wherein R.sub.1 is alkyl, alkenyl or aralkyl of 4-18 carbon atoms, R.sub.2 is hydrogen or same as R.sub.1, R.sub.3 is hydrogen or methyl, A is alkylene of 2-4 carbon atoms, and n is 1-200. Sulfates, phosphates and sulfosuccinates thereof are also useful as anionic surfactants.
    Type: Grant
    Filed: November 10, 1987
    Date of Patent: April 17, 1990
    Assignee: Dai-Ichi Kogyo Seiyaku Co., Ltd.
    Inventors: Kinya Yokota, Akinobu Ichihara, Hitoshi Shinike
  • Surface active compounds having a polymerizable moiety
    Patent number: 4814514
    Abstract: Novel surfactants of the formula: ##STR1## wherein R.sub.1 is alkyl, alkenyl, alkylaryl or aralkylaryl of 8-30 carbon atoms,A is alkylene of 2-4 carbon atoms,x is 0, or 1-100 andy is 1-200. Sulfates, phosphates and sulfosuccinates thereof are also useful as anionic surfactants.
    Type: Grant
    Filed: May 6, 1987
    Date of Patent: March 21, 1989
    Assignee: Dai-Ichi Kogyo Seiyaku Co., Ltd.
    Inventors: Kinya Yokota, Akinobu Ichihara
  • Sizing agent suitable for use in paper making
    Patent number: 4666523
    Abstract: A composition useful as a paper sizing agent comprising a substituted succinic anhydride of the formula: ##STR1## wherein R is a hydrocarbon group having at least 6 carbon atoms selected from the group consisting of an alkyl group, an alkenyl group, an aralkyl group or an aralkenyl group,and a non-ionic surface active agent having a terminal hydroxyl group bonding to tertiary carbon. The composition has excellent storage stability, and can exhibit an excellent sizing effect even if stored for a long term.
    Type: Grant
    Filed: February 20, 1986
    Date of Patent: May 19, 1987
    Assignees: Dai-chi Kogyuo Seiyaku Co., Ltd., Mitsubishi Oil Co., Ltd.
    Inventors: Kinya Yokota, Akinobu Ichihara, Yasuharu Tanakamaru, Yoshio Takahashi
  • Method for preventing adhesion of rubber or rubber-like material and compositions therefor
    Patent number: 3990990
    Abstract: A method for preventing adhesion of rubber or rubber-like material to adjacent surfaces comprises treating a surface of rubber or rubber-like material with an aqueous solution of at least one water soluble aromatic compound having at least one --SO.sub.2 -- group. A surface active agent may be included coexistently in the aqueous solution.
    Type: Grant
    Filed: May 2, 1975
    Date of Patent: November 9, 1976
    Assignees: Dai-Ichi Kogyo Seiyaku Co., Ltd., Bridgestone Tire Company Limited
    Inventors: Tatsuo Kojima, Akinobu Ichihara, Isao Togashi, Mikio Koga