Patents by Inventor Isao Sekido

Isao Sekido 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).

  • Emulsifier composition for asphalt emulsion
    Patent number: 4172046
    Abstract: An emulsifier composition suitable for preparing an asphalt emulsion comprises a monoamine having an aliphatic hydrocarbon group having 8 to 22 carbon atoms, a diamine having an aliphatic hydrocarbon group having 8 to 22 carbon atoms and a polyamine having an aliphatic hydrocarbon group having 8 to 22 carbon atoms and containing 3 to 6 amino groups, wherein the average number of amino groups contained therein is at least 1.7.
    Type: Grant
    Filed: March 20, 1978
    Date of Patent: October 23, 1979
    Assignee: Kao Soap Co., Ltd.
    Inventors: Tadashi Doi, Isao Sekido
  • Asphalt having high adhesion strength and its preparation
    Patent number: 3963509
    Abstract: Asphalt having a high adhesion strength is prepared by incorporating in asphalt a small amount of monocarboxylic chromic chloride expressed by the following general formula: ##EQU1## WHEREIN R is an alkyl or alkenyl group having 1 to 21 carbon atoms, as an antistripping agent.
    Type: Grant
    Filed: January 13, 1975
    Date of Patent: June 15, 1976
    Assignee: Kao Soap Co., Ltd.
    Inventors: Tadashi Doi, Isao Sekido, Ryoichi Tamaki
  • Method for rapid hardening of asphalt emulsions
    Patent number: 3932331
    Abstract: Asphalt emulsions are rapidly hardened by incorporating therein an isocyanate-terminated urethane prepolymer formed by reacting one equivalent of the OH group of a polyalkylene glycol having the following formula ##EQU1## wherein p + r .gtoreq. q, q .gtoreq. O, p .gtoreq. 1, r .gtoreq. 1 and 20 .ltoreq. p + q + r .ltoreq. 100, with 1.1 to 2.0 equivalents of the NCO group of an organic diisocyanate.
    Type: Grant
    Filed: November 6, 1974
    Date of Patent: January 13, 1976
    Assignee: Kao Soap Co., Ltd.
    Inventors: Tadashi Doi, Isao Sekido, Ryoichi Tamaki