Patents by Inventor Hisashi Kaga

Hisashi Kaga 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).

  • Electric circuit device having circuit conductors using an electroconductive paste
    Patent number: 6042933
    Abstract: Electroconductive composite metal powders comprising flat non-noble metal powders, each covered with a noble metal in an amount of 2 to 30% by weight in average based on the weight of the non-noble metal powders, on 50% or more in average of the whole surface area of the non-noble metal powders, interposing a layer of a mixture of the non-noble metal and noble metal between each non-noble metal powder and a noble metal covering layer, are suitable for providing an electroconductive paste after mixing with a binder, said paste showing excellent electroconductivity and prevention of migration.
    Type: Grant
    Filed: August 13, 1998
    Date of Patent: March 28, 2000
    Assignees: Hitachi Chemical Company, Ltd., Technopolis Hakodata Industrial Technology Promotion Organization
    Inventors: Keizo Hirai, Hiroshi Wada, Akihiro Sasaki, Hisashi Kaga, Junichi Kikuchi, Shozo Yamana, Hideji Kuwajima
  • Electroconductive paste
    Patent number: 5840432
    Abstract: Electroconductive composite metal powders comprising flat non-noble metal powders, each covered with a noble metal in an amount of 2 to 30% by weight in average based on the weight of the non-noble metal powders, on 50% or more in average of the whole surface area of the non-noble metal powders, interposing a layer of a mixture of the non-noble metal and noble metal between each non-noble metal powder and a noble metal covering layer, are suitable for providing an electroconductive paste after mixing with a binder, said paste showing excellent electroconductivity and prevention of migration.
    Type: Grant
    Filed: February 8, 1996
    Date of Patent: November 24, 1998
    Assignees: Hitachi Chemical Company, Ltd., Technopolis Hakodate Industrial Technology
    Inventors: Keizo Hirai, Hiroshi Wada, Akihiro Sasaki, Hisashi Kaga, Junichi Kikuchi, Shozo Yamana, Hideji Kuwajima
  • Method for the insulation of heated metalic materials
    Patent number: 4504527
    Abstract: A method for the insulation of a hot metallic material which is heated for hot working is described, which comprises applying a mixture of acidic aluminum phosphate, e.g., aluminum hydrogenorthophosphate, a multivalent metal oxide, hydroxide, silicate or carbonate powder, and water onto the surface of the hot metallic material and allowing the mixture to be heated by the heat of the hot metallic material to convert it to a porous hardened material. The porous hardened material acts as an insulating coating layer for the hot metallic material, permitting hot working in an insulated state for a long period of time.
    Type: Grant
    Filed: February 16, 1982
    Date of Patent: March 12, 1985
    Assignees: The Japan Steel Works, Ltd., Nichias Corporation
    Inventors: Sadao Hara, Hiroaki Moritani, Hisashi Kaga, Toshihiro Minaki, Kenichi Shibata, Junichi Ogawa, Kaoru Umino