Patents by Inventor Dietrich Schuppan

Dietrich Schuppan 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).

  • Method of using 7-hydroxy-benzo[ij]quinolizine-2-carboxylic acid derivatives
    Patent number: 4051247
    Abstract: Certain substituted 6,7-dihydro-7-hydroxy-1-oxo-1H,5H-benzo[ij]quinolizine-2-carboxylic acids and salt and ester derivatives thereof are described. These compounds are useful antibacterial agents. SPThis is a division of application Ser. No. 567,510, filed Apr. 14, 1975, now U.S. Pat. No. 3,985,753.
    Type: Grant
    Filed: March 24, 1976
    Date of Patent: September 27, 1977
    Assignee: Riker Laboratories, Inc.
    Inventors: Dietrich Schuppan, John F. Gerster, Charles M. Leir
  • 7-Hydroxy-benzo[ij]quinolizine-2-carboxylic acids and derivatives thereof
    Patent number: 3985753
    Abstract: Certain substituted 6,7-dihydro-7-hydroxy-1-oxo-1H,5H-benzo[ij]quinolizine-2-carboxylic acids and salt and ester derivatives thereof are described. These compounds are useful antibacterial agents.
    Type: Grant
    Filed: April 14, 1975
    Date of Patent: October 12, 1976
    Assignee: Riker Laboratories, Inc.
    Inventors: Dietrich Schuppan, John F. Gerster, Charles M. Leir