Patents by Inventor Tooru Hirota

Tooru Hirota 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).

  • Method of producing Cu - Ag alloy based conductive material
    Patent number: 5534087
    Abstract: A method for producing a Cu--Ag alloy based conductive material containing about 10% to about 20% at % Ag, that involves the steps of continuously casting the alloy into a rod followed by quickly cooling the rod, cold-working the rod to a reduction in area of 80% or more, then heat treating the cold-worked rod at a temperature of 250.degree. C. to 350.degree. C. for 1 hour or more to form a heat-treated rod, and thereafter cold-working the heat-treated rod to a reduction in area of 90% or more as defined based on the cast rod to produce conductive material having a high strength of 700 MPa or more and conductivity of 75% IACA or more.
    Type: Grant
    Filed: September 15, 1993
    Date of Patent: July 9, 1996
    Assignees: Showa Electric Wire & Cable Co., Ltd., General Director of National Research Institute for Metals
    Inventors: Tooru Hirota, Akira Imai, Tomoyuki Kumano, Masamitsu Ichihara, Yoshikazu Sakai, Kiyoshi Inoue, Hiroshi Maeda