Patents Assigned to Chuo Yuka Co., Ltd.
  • Patent number: 7744686
    Abstract: The invention provides a frost-preventive composition which strongly defrosts and melts ice and which prevents frosting for a long period of time and which does not run or sag when applied to a wall surface or the like.
    Type: Grant
    Filed: March 28, 2006
    Date of Patent: June 29, 2010
    Assignees: NOF Corporation, Chuo Yuka Co., Ltd.
    Inventors: Hidefumi Tochigi, Daijiro Shiino, Kosuke Tsuda, Akinori Itoh, Hiroshi Mori, Masaaki Kume
  • Patent number: 4529530
    Abstract: Triurea grease compositions having excellent oil separation, shear stability, oxidation stability and structural stability of a thickening agent at a high temperature, which contains a triurea compound ##STR1## wherein R.sub.1 is a monovalent aliphatic hydrocarbon radical having 12-24 carbon atoms, R.sub.2 is a divalent triazine derivative radical, R.sub.3 is a divalent aromatic hydrocarbon radical having 6-15 carbon atoms or the derivative radical thereof, and R.sub.4 is at least one of monovalent aliphatic hydrocarbon radicals having 2-24 carbon atoms, derivative radicals thereof, monovalent aromatic hydrocarbon radicals having 6-10 carbon atoms and derivative radicals thereof, as a thickening agent in a usual lubricating base oil.
    Type: Grant
    Filed: September 19, 1983
    Date of Patent: July 16, 1985
    Assignees: Chuo Yuka Co., Ltd., Mitsui Toatsu Chemicals, Inc., Nippon Steel Corporation
    Inventors: Shirow Shimizu, Shuichi Takahashi, Kazuo Kato, Koichi Takeuchi, Kozo Iwasaki, Motofumi Kurahashi, Tetsuo Ichimaru