Patents by Inventor Kazuhisa Toyoda

Kazuhisa Toyoda 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 and kit for energy transfer immunoassay with colloidal particles
    Patent number: 5434088
    Abstract: A target substance is detected by a sandwich immunoassay using fine particle (A) having bound to it a fluorescer and an antibody reacting specifically with the target substance, and a fine particle (B) having bound to it a quencher and an antibody reacting specifically with the target substance, through a different antigenic determinant. Also disclosed is a competitive immunoassay having a fine particle (C) bound to it a fluorescer or a quencher, and an antibody reacting specifically with the target substance, a bound product (D) composed of the remainder of the fluorescer and the quencher, or a known amount of the target substance. Binding of the fluorescer and the quencher to the fine particle (A), (B) or (C) is affected so that the fluorescer and the quencher are covalently bound to a substance adsorbed on the fine particle.
    Type: Grant
    Filed: May 24, 1994
    Date of Patent: July 18, 1995
    Assignee: Tosoh Corporation
    Inventors: Kenji Ikeda, Kazuhisa Toyoda, Hideo Suzuki