Patents by Inventor Alton D. Johnson

Alton D. Johnson 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).

  • Trovafloxacin mesylate tablet
    Patent number: 6187341
    Abstract: Compositions, especially in the form of tablets containing the polymorph II form of trovafloxacin mesylate, a lubricant, and microcrystalline cellulose (MC) as the diluent. Such compositions employing MC as a diluent exhibit good storage stability properties and dissolution.
    Type: Grant
    Filed: January 20, 1999
    Date of Patent: February 13, 2001
    Assignee: Pfizer Inc.
    Inventors: Alton D. Johnson, Christopher M. Sinko
  • Taste-masking composition of bitter pharmaceutical agents
    Patent number: 5633006
    Abstract: A pharmaceutical composition having reduced bitterness consisting of a bitter pharmaceutical agent, a taste-masking component and a pharmaceutically acceptable carrier. The taste-masking component is an alkaline earth oxide, an alkaline earth hydroxide or an alkaline hydroxide and does not interfere with the activity of the pharmaceutical agent.
    Type: Grant
    Filed: October 24, 1994
    Date of Patent: May 27, 1997
    Assignee: Pfizer Inc.
    Inventors: Joseph S. Catania, Alton D. Johnson