Patents Assigned to Denka Kogyo Kabushiki Kaisha
  • Water in oil emulsion
    Patent number: 3939290
    Abstract: This invention relates to an edible emulsion which is stable during storage and carriage and the phases of which are reversed by mechanical working to form an oil-in-water type emulsion, containing a polyhydric alcohol fatty acid ester having a substantial proportion of a polyhydric alcohol fatty acid ester in an amount of about 0.25 - 2.5% by weight of said emulsion and a sucrose fatty acid ester having an HLB value of at least 10 in an amount of about 0.5 - 5% by weight of said emulsion.
    Type: Grant
    Filed: July 19, 1973
    Date of Patent: February 17, 1976
    Assignee: Asahi Denka Kogyo Kabushiki Kaisha
    Inventors: Kimio Terada, Satoshi Fujita, Shigeru Oinuma, Hiroshige Kohno
  • Etching solutions for copper and copper alloys and etching process using the same
    Patent number: 3939089
    Abstract: This invention provides etching solutions for copper and copper alloys comprising a mixed aqueous solution of a peroxysulfate with a purine compound and a halogen compound added as the catalyst. There is also provided a process for etching copper or copper alloys with said etching solutions.
    Type: Grant
    Filed: September 30, 1974
    Date of Patent: February 17, 1976
    Assignee: Tokai Denka Kogyo Kabushiki Kaisha
    Inventors: Akira Matsumoto, Katsutoshi Itani
  • Copper and copper alloy etching solutions and process
    Patent number: 3936332
    Abstract: This invention provides cooper and copper alloy etching solutions comprising a mixed aqueous solution of a peroxysulfate with a diazine compound and a halogen compound added as the catalyst. There is also provided a process for etching copper and copper alloys with said etching solutions.
    Type: Grant
    Filed: September 30, 1974
    Date of Patent: February 3, 1976
    Assignee: Tokai Denka Kogyo Kabushiki Kaisha
    Inventors: Akira Matsumoto, Katsutoshi Itani