Patents by Inventor by Eijiro Okamura, legal representative

by Eijiro Okamura, legal representative 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 producing indoline derivatives
    Patent number: 4159271
    Abstract: Indoline derivatives having the formula ##STR1## wherein R.sub.1, R.sub.2 and R.sub.3 are defined below are produced by a cyclization of 2-halogenophenethylamine compounds having the formula ##STR2## wherein R.sub.1 represents hydrogen atom, a lower alkyl, a lower alkoxyl, nitro or hydroxyl group; R.sub.2 represents hydrogen atom; a lower alkoxyl or nitro group; R.sub.3 represents hydrogen atom or a lower alkyl group and at least one of R.sub.1, R.sub.2 and R.sub.3 is a lower alkyl, a lower alkoxyl or nitro group; and X represents a halogen atom, in the presence of a copper type catalyst and ammonia.
    Type: Grant
    Filed: January 18, 1978
    Date of Patent: June 26, 1979
    Assignee: Ihara Chemical Industry Co., Ltd.
    Inventors: Hironobu Sano, deceased, Sataro Okamura, deceased, by Eijiro Okamura, legal representative, Yoshiki Nakayama, Kazunari Hirao