Patents by Inventor Tasuhiro Tsujii

Tasuhiro Tsujii 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).

  • Process for preparing a s-substituted phosphoro-chloridothiolate
    Patent number: 4983749
    Abstract: A process for preparing a S-substituted phosphorochloridothiolate having the formula: ##STR1## wherein R.sup.1 is a chlorine atom or an alkoxy or phenoxy group which may be substituted, and R.sup.2 is an alkyl, alkenyl, alkynyl, cycloalkyl or phenyl group which may be substituted, which comprises isomerizing an O-substituted phosphorochloridothionate having the formula: ##STR2## wherein R.sup.1 and R.sup.2 are as defined above, in the presence of a Lewis acid catalyst or a phosphorus compound catalyst.
    Type: Grant
    Filed: January 15, 1988
    Date of Patent: January 8, 1991
    Assignee: Ishihara Sangyo Kaisha Ltd.
    Inventors: Tasuhiro Tsujii, Tatsuo Isogai, Takao Awazu, Tokiya Kimura