Patents by Inventor Ashok K. Trehan

Ashok K. Trehan 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).

  • 5-amino and 5-hydroxy-6-fluoroquinolones as antibacterial agents
    Patent number: 4977154
    Abstract: Novel 7-piperazine derivatives of 5-amino- and 5-hydroxy-1-cyclopropyl-1,4-dihydro-4-oxoquinoline-3-carboxylic acids as antibacterial agents are described as well as methods for their manufacture, formulation, and use in treating bacterial infections.
    Type: Grant
    Filed: October 20, 1986
    Date of Patent: December 11, 1990
    Assignee: Warner-Lambert Company
    Inventors: Joseph P. Sanchez, Ashok K. Trehan
  • 5-amino-6,8-difluoroquinolones as antibacterial agents
    Patent number: 4668680
    Abstract: Novel 7-piperazino and 7-N-methylpiperazino derivatives of 5-amino-1-cyclopropyl-6,8-dihydro-1,4-dihydro-4-oxoquinoline-3-carboxylic acids as antibacterial agents are described as well as methods for their manaufacture, formulation, and use in treating bacterial infections.
    Type: Grant
    Filed: December 12, 1985
    Date of Patent: May 26, 1987
    Assignee: Warner-Lambert Company
    Inventors: Ashok K. Trehan, Joseph P. Sanchez
  • 1-cyclopropyl-6,7-dihalo-1,4-dihydro-4-oxo-1,8-naphthyridine -3-carboxylic acid and their esters, useful as intermediates for preparing the 7-amine substituted naphthyridines
    Patent number: 4663457
    Abstract: 1-cyclopropyl-6,7-dihalo-1,4-dihydro-4-oxo-1,8-naphthyridine-3-carboxylic acids and their esters, which are useful as intermediates for the preparation of compounds which are useful as anti-bacterial agents.
    Type: Grant
    Filed: August 13, 1985
    Date of Patent: May 5, 1987
    Assignee: Warner-Lambert Company
    Inventors: Thomas F. Mich, Joseph P. Sanchez, John M. Domagala, Ashok K. Trehan