Patents by Inventor Toshikuni Kajno

Toshikuni Kajno 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).

  • Organic optical nonlinear material and optical nonlinear device
    Patent number: 5284922
    Abstract: In a second-order or third-order organic nonlinear optical material, one of compounds represented by the following formulas (1) and (2) is bonded to a polymer: ##STR1## wherein each of .pi..sub.1 to .pi..sub.n independently represents a cyclic compound of a .pi. electron conjugate system, at least one of R.sub.11 to R.sub.n4 represents an alkyl substituting group derivative and others represent hydrogen, each of X.sub.1 to X.sub.n-1 and Y.sub.1 to Y.sub.n-1 represents one member selected from the group consisting of CH, N, and N.fwdarw.O, A represents an electron acceptor group, D represents an electron donor group, and n is an integer of 3 or more.
    Type: Grant
    Filed: March 23, 1993
    Date of Patent: February 8, 1994
    Assignee: Nippon Telegraph and Telephone Corporation
    Inventors: Michiyuki Amano, Yoshito Shuto, Toshikuni Kajno