Patents by Inventor Kyu Tai Lee

Kyu Tai Lee 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).

  • 6,7-Methylenedioxy-1-(2,2,2-trifluoroethyl)-4(1H)-quinolone-3-carboxylic acid
    Patent number: 4086236
    Abstract: Certain esters of 6,7-methylenedioxy-1-(2,2,2-trifluoroethyl)-4(1H)-quinolone-3-carboxylic acid, such as the trimethylacetoxymethyl ester, useful as antibacterials.
    Type: Grant
    Filed: December 6, 1976
    Date of Patent: April 25, 1978
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Kyu Tai Lee
  • 6,7-Methylenedioxy-1-(2,2,2-trifluoroethyl)-4(1H)-quinolone-3-carboxylic acid and its salts and esters
    Patent number: 4036962
    Abstract: Certain novel 6,7-methylenedioxy-1-(2,2,2-trifluoroethyl)-4(1H)-quinolone-3-carboxylic acid esters are useful in the treatment of bacterial infections in warm-blooded animals. The novel 6,7-methylenedioxy-1-(2,2,2-trifluoroethyl)-4(1H)-quinolone-3-carboxylic acid and its salts and alkyl esters of 1 to 3 carbon atoms are useful as chemical intermediates.
    Type: Grant
    Filed: May 16, 1975
    Date of Patent: July 19, 1977
    Assignee: E. I. Du Pont de Nemours and Co.
    Inventor: Kyu Tai Lee