Patents by Inventor Fumihiko Tsuchitani

Fumihiko Tsuchitani 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).

  • Detergent, method of cleaning, and apparatus for cleaning
    Patent number: 5789359
    Abstract: The detergent of this invention, directed to the cleaning of an object having a gap portion at least in part thereof, contains at least one of components of the detergent having a solubility parameter difference of not more than 3 from and a contact angle within 15.degree. with at least one of components of a smear on the object. The detergent provides an ideal cleaning for the object because it easily permeates into and dissolves the machining oil filling the gaps between closely cohering thin metallic strips. The method of cleaning according to the invention has first cleaning the object with a polar detergent and then rinsing and drying the cleaned object with a detergent having low polarity or no polarity. In the precision cleaning of such objects as electronic parts, therefore, it manifests satisfactory cleaning and drying properties.
    Type: Grant
    Filed: April 2, 1996
    Date of Patent: August 4, 1998
    Assignees: Kabushiki Kaisha Toshiba, Toshiba Silicone Co., Ltd.
    Inventors: Hiroshi Shimozawa, Masaru Kumagai, Fumihiko Tsuchitani, Mayumi Koga, Tadayuki Nakamura, Nobuhiro Saitoh, Shigeo Yamafuji