Patents by Inventor Yasushi Teshima

Yasushi Teshima 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).

  • Process for preparing fine-particulate metal hydroxide comprising aluminum hydroxide and metal oxide comprising aluminum oxide
    Patent number: 5573582
    Abstract: The present invention discloses a process for preparing a fine-particulate metal hydroxide comprising aluminum hydroxide as a major component which comprises continuously supplying water and a mixture of an aluminum alkoxide and at least one alkoxide of a metal selected from Mg, Ca, La, Fe, Si, Ti and Zr, to a high shear rate stirring area and a process for preparing a fine-particulate metal oxide comprising aluminum oxide as a major component which comprises drying and then calcining said metal hydroxide at 500.degree.-1500.degree. C.
    Type: Grant
    Filed: June 23, 1995
    Date of Patent: November 12, 1996
    Assignee: Sumitomo Chemical Co., Ltd.
    Inventors: Masamichi Inui, Yoshiaki Takeuchi, Yasushi Teshima, Koji Yamamoto, Makio Kimura, Takahiro Ishida
  • Continuous process for preparing aluminum hydroxide
    Patent number: 5455019
    Abstract: Aluminum hydroxide containing no coarse particle is prepared by continuously supplying at least one compound selected from the group consisting of aluminum alkoxides and aluminum alkoxide derivatives which are prepared by chemically modifying aluminum alkoxides, and water under high shear rate stirring.
    Type: Grant
    Filed: December 21, 1993
    Date of Patent: October 3, 1995
    Assignee: Chemical Company, Limited Sumitomo
    Inventors: Masamichi Inui, Yasushi Teshima, Yoshiaki Takeuchi
  • Translucent polycrystalline alumina and process for producing the same
    Patent number: 5382556
    Abstract: Translucent polycrystalline alumina made of aluminum oxide containing magnesium oxide in an amount of larger than 0.01% by weight and less than 0.03% by weight, zirconium oxide in an amount of larger than 0.01% by weight and less than 0.06% by weight and calcium oxide in an amount of less than 0.001% by weight, all based on the weight of aluminum oxide, which alumina has good light transmittance and mechanical strength.
    Type: Grant
    Filed: April 21, 1993
    Date of Patent: January 17, 1995
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Hiroshi Takahashi, Hiroshi Umezaki, Yasushi Teshima