Patents by Inventor Keiichiro Adachi

Keiichiro Adachi 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).

  • Crosslinked polyphosphazenes as piezoelectric materials
    Patent number: 4933479
    Abstract: Piezoelectric materials characterized by consisting essentially of crosslinked polyphosphazenes obtained by bringing polyphosphazenes which have repeating structural units represented by the general formula [I]--NP(X).sub.a (Y).sub.b -- [I](all the symbols are as defined in the appended claims) into oriented state in an electric field provided by applying high voltage on them and then crosslinking them under such conditions.Piezoelectric materials thus obtained display an excellent piezoelectric effect and, in addition, rubber elasticity.
    Type: Grant
    Filed: October 26, 1989
    Date of Patent: June 12, 1990
    Assignee: Idemitsu Petrochemical Co., Ltd.
    Inventors: Tadao Kotaka, Keiichiro Adachi