Patents by Inventor P. Le Hao Dong

P. Le Hao Dong 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).

  • Pyrazolo-quinolines, compositions and pharmaceutical preparations
    Patent number: 4190661
    Abstract: This invention relates to compounds having the formula: ##STR1## in which: R represents a C.sub.1-6 alkyl radical or a C.sub.1-6 alkenyl radical; A represents an indazol-2,3- or 4,5- or 6,7-diyl radical, which indazoldiyl radical may be substituted on the nitrogen atoms at 1- or 2-position with C.sub.1-6 alkyl or phenyl-(C.sub.1-6) alkyl radicals, and their salts with pharmaceutically acceptable bases.Said compounds are therapeutically useful as antibacterial agents.
    Type: Grant
    Filed: May 16, 1978
    Date of Patent: February 26, 1980
    Assignee: Laboratoires Chauvin-Blache
    Inventors: P. Le Hao Dong, Claude Coquelet