Patents by Inventor Kenkichi Hamabe

Kenkichi Hamabe 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).

  • Corrosion inhibitor for cement compositions
    Patent number: 6355100
    Abstract: An anti-corrosion agent for use with a cementitious composition which is to be reinforced, comprising one or more species selected from a group consisting of alkyldiamines represented by the general formula RHN—(CH2)n-NH2 (in which R is an alkyl having C8-22 atoms, and n is an integer of 1-5) and alkylamines represented by the general formula R—NH2 (in which R is an alkyl having C8-22 atoms). The agents give good anti-corrosion performance which does not decline with time and exposure to the elements to the same extent as is the case with conventional anti-corrosion agents.
    Type: Grant
    Filed: January 2, 2001
    Date of Patent: March 12, 2002
    Assignee: MBT Holding AG
    Inventors: Kenkichi Hamabe, Takao Furusawa, Takeo Ozawa, Yuki Hagiwara
  • Admixture for concrete mixes
    Patent number: 5350450
    Abstract: A method for applying a cementitious composition to a surface comprising1) adding to the cementitious compositiona) a set retarding agent;b) a cement quick-setting agent;c) a cement dispersing agent;d) a slow release dispersing agent, that hydrolyzes under alkaline conditions to form a dispersing agent; and2) applying the concrete to a surface while the concrete is fluid.
    Type: Grant
    Filed: April 30, 1993
    Date of Patent: September 27, 1994
    Assignee: Sandoz Ltd.
    Inventors: Kenkichi Hamabe, Shigemi Matsuo, Hiroshi Nomachi, Hideo Ogawa, Minoru Ueda