Patents by Inventor Nobuo Ishikawa

Nobuo Ishikawa 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).

  • 4-Fluoro-5-oxypyrazole derivatives
    Patent number: 4480103
    Abstract: These compounds are especially useful as intermediates to the corresponding thionophosphonic acid esters having insecticidal and acaricidal properties.
    Type: Grant
    Filed: November 5, 1981
    Date of Patent: October 30, 1984
    Assignees: Ihara Chemical Industry Co., Ltd., Daikin Kogyo Co., Ltd.
    Inventors: Nobuo Ishikawa, Tomoya Kitazume
  • N,N-Dialkyl-3-oxo-3-alkyl-1,2-difluoropropenylamine
    Patent number: 4465859
    Abstract: N,N-dialkyl-3-oxo-3-alkyl-1,2-difluoropropenylamine expressed by the following general formula: ##STR1## where R.sup.1, R.sup.2 and R.sup.3 are same or different alkyl groups.
    Type: Grant
    Filed: August 31, 1983
    Date of Patent: August 14, 1984
    Assignee: Daikin Kogyo Co., Ltd.
    Inventors: Nobuo Ishikawa, Tomoya Kitazume