Patents Assigned to Prest Corporation
  • Treating agent for oil
    Patent number: 6653355
    Abstract: An oil treating agent of W/O emulsion, wherein an aqueous dispersed phase is dispersed in an oily continuous phase, and wherein the dispersed phase is an alkaline mixture solution obtained by mixing water, a solution comprising water and an alcohol, or a water-free alcohol solution with an alkali hydroxide e.g. sodium hydroxide or with a metal alkoxide e.g. sodium alkoxide and the continuous phase comprises a liquid incompatible with the dispersed phase.
    Type: Grant
    Filed: September 5, 2000
    Date of Patent: November 25, 2003
    Assignees: Hakugen Co., Ltd., Prest Corporation
    Inventors: Tatsuo Kasahara, Tomohiro Shiiya, Kunimitsu Tamura