Patents by Inventor Mitsuo Ejiri

Mitsuo Ejiri 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).

  • Lubricant sheet for drilling and method of drilling
    Patent number: 9211592
    Abstract: A lubricant sheet suitable for use in a process of drilling a laminate or a plastic board, comprising a metal foil or an organic film, and a lubricant resin composition layer or a primer layer and the lubricant resin composition layer, the lubricant resin composition layer or the primer layer and the lubricant resin composition layer being formed on at least one surface of the metal foil or the organic film, wherein at least one layer of the primer layer and the lubricant resin composition layer contains a colorant, and a drilling method using the above lubricant sheet.
    Type: Grant
    Filed: March 10, 2008
    Date of Patent: December 15, 2015
    Assignee: MITSUBISHI GAS CHEMICAL COMPANY, INC.
    Inventors: Nobuyuki Ikeguchi, Takuya Hasaki, Shinya Komatsu, Toshihiko Kobayashi, Mitsuo Ejiri
  • Lubricant sheet for drilling and method of drilling
    Publication number: 20080166565
    Abstract: A lubricant sheet suitable for use in a process of drilling a laminate or a plastic board, comprising a metal foil or an organic film, and a lubricant resin composition layer or a primer layer and the lubricant resin composition layer, the lubricant resin composition layer or the primer layer and the lubricant resin composition layer being formed on at least one surface of the metal foil or the organic film, wherein at least one layer of the primer layer and the lubricant resin composition layer contains a colorant, and a drilling method using the above lubricant sheet.
    Type: Application
    Filed: March 10, 2008
    Publication date: July 10, 2008
    Inventors: Nobuyuki Ikeguchi, Takuya Hasaki, Shinya Komatsu, Toshihiko Kobayashi, Mitsuo Ejiri
  • Lubricant sheet for drilling and method of drilling
    Publication number: 20050003169
    Abstract: A lubricant sheet suitable for use in a process of drilling a laminate or a plastic board, comprising a metal foil or an organic film, and a lubricant resin composition layer or a primer layer and the lubricant resin composition layer, the lubricant resin composition layer or the primer layer and the lubricant resin composition layer being formed on at least one surface of the metal foil or the organic film, wherein at least one layer of the primer layer and the lubricant resin composition layer contains a colorant, and a drilling method using the above lubricant sheet.
    Type: Application
    Filed: July 8, 2004
    Publication date: January 6, 2005
    Inventors: Nobuyuki Ikeguchi, Takuya Hasaki, Shinya Komatsu, Toshihiko Kobayashi, Mitsuo Ejiri
  • Method of drilling a hole for printed wiring board
    Patent number: 5480269
    Abstract: A method of drilling a through-hole for inter-surface conduction in a laminate for a printed wiring board, in which the heat generation in a drill bit can be inhibited in drilling holes, quality holes can be highly efficiently made in the presence, on the laminate surface, of a novel water-soluble lubricant sheet which has high strength and can be handled easily, the method comprising drilling the through-holes in the presence of a water-soluble lubricant sheet which has a thickness of 0.02 to 3 mm and is formed from a mixture of 20 to 90% by weight of a polyether ester with 10 to 80% by weight of a water-soluble lubricant.
    Type: Grant
    Filed: June 6, 1994
    Date of Patent: January 2, 1996
    Assignee: Mitsubishi Gas Chemical Company, Inc.
    Inventors: Mitsuo Ejiri, Hidenori Kinbara
  • Process for producing curable resin composition from cyanate ester and maleimide/diamine reaction product
    Patent number: 4585855
    Abstract: A process for producing a curable resin liquid comprising: (a) at least one cyanate ester compound and (b) at least one polyfunctional maleimide compound, characterized in that the process comprises:(A) reacting at least one said maleimide compound with said diamine in the presence of a diluent at a temperature of 60.degree.-200.degree. C., the ratio of the maleimide group to the amine group being in the range of from 1:0.0015 to 1:0.3 to form a preliminary reaction product substantially free from amine group; and(B) mixing said preliminary reaction product with at least one cyanate ester compound ratio by weight of said preliminary reaction product to said cyanate ester compound is disclosed.
    Type: Grant
    Filed: February 28, 1985
    Date of Patent: April 29, 1986
    Assignee: Mitsubishi Gas Chemical Company, Inc.
    Inventors: Morio Gaku, Hidenori Kimbara, Mitsuo Ejiri