Patents Assigned to Hashimoto Chemical Company, Ltd.
  • Surface treating composition for micro processing
    Patent number: 5803956
    Abstract: Hydrofluoric acid has incorporated therein a hydrocarbon nonionic surfactant having an HLB value of 7 to 17. The composition exhibits improved wetting and other properties for use in surface treatment for micro processing.
    Type: Grant
    Filed: January 11, 1996
    Date of Patent: September 8, 1998
    Assignee: Hashimoto Chemical Company, Ltd.
    Inventors: Tadahiro Ohmi, Matagoro Maeno, Hirohisa Kikuyama