Patents by Inventor Kazuyuki Takakuwa

Kazuyuki Takakuwa 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).

  • Flux for soldering electronic components on circuit substrates, and mounted or unmounted circuit substrate
    Patent number: 5863355
    Abstract: The invention provides a soldering flux for mounting circuit substrates, which is free from any organic solvent attributable to air pollution and dispenses with any washing step. The soldering flux is obtained by dissolving a rosin modified by an unsaturated organic acid according to the Diels-Alder reaction in an aqueous solvent. A volatile basic agent may further be contained in the flux.
    Type: Grant
    Filed: February 27, 1996
    Date of Patent: January 26, 1999
    Assignee: Tamura Kaken Co., Ltd.
    Inventors: Takao Ohno, Shouichi Saito, Satoshi Shinohara, Kazuyuki Takakuwa