Patents by Inventor Atsuo Sakamoto

Atsuo Sakamoto 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).

  • Packing material for column and process for production thereof
    Patent number: 5672422
    Abstract: A packing material for a column comprises a porous support coated with silicone polymer having an Si--R bond, wherein R is a hydrophobic group and an Si--R' bond, wherein R' is a hydrophilic group, and a process for the production thereof.
    Type: Grant
    Filed: February 25, 1992
    Date of Patent: September 30, 1997
    Assignee: Shiseido Company Ltd.
    Inventors: Taketoshi Kanda, Atsuo Sakamoto, Michio Yokouchi, Yutaka Ohtsu
  • Column packing material with both hydrophobic and hydrophilic groups and process for production thereof
    Patent number: 5135649
    Abstract: A column packing material comprising a porous support coated with a silicone polymer having an Si--R bond, wherein R is a hydrocarbon group having 1 to 18 carbon atoms, and an Si--R' bond, wherein R' is a hydrophilic group having one or more of polyoxyalkylene group or hydroxyl group at the terminal end, of which column packing material is produced by:modifying a porous support by bonding hydrocarbon groups to the porous support;eliminating a part of the hydrocarbon groups from the modified porous support; andmodifying the porous support by bonding hydrophilic groups thereto.
    Type: Grant
    Filed: September 25, 1990
    Date of Patent: August 4, 1992
    Assignee: Shiseido Company Ltd.
    Inventors: Taketoshi Kanda, Atsuo Sakamoto, Tadao Ohta, Yutaka Ohtsu