Patents by Inventor Sham K. Chopra

Sham K. Chopra 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).

  • Controlled release device
    Patent number: 5342627
    Abstract: The invention relates to a device for the release of at least one active substance (e.g.
    Type: Grant
    Filed: November 12, 1992
    Date of Patent: August 30, 1994
    Assignee: Glaxo Canada Inc.
    Inventors: Sham K. Chopra, Avinash K. Nangia, David Lee, Thomas P. Molloy
  • Pharmaceutical capsules containing panetidine
    Patent number: 5028432
    Abstract: The invention relates to a pharmaceutical composition in the form of a gelatin capsules consisting of a filling containing as active ingredient ranitidine or a physiologically acceptable salt thereof surrounded by a gelatin shell. The filling is formulated based on a non-aqueous matrix consisting of at least one fatty acid glyceride and/or mineral oil or paraffin. Preferably the matrix contains at least one surfactant. The matrix is essentially hydrophobic in character but is also sufficiently hydrophilic to permit dispersion and dissolution of the capsule filling in the gastrointenstinal tract.
    Type: Grant
    Filed: February 22, 1990
    Date of Patent: July 2, 1991
    Assignee: Glaxo Canada, Inc.
    Inventors: Sham K. Chopra, Tribhovan T. Makadia
  • Preparation of aqueous alcoholic dispersions of pH sensitive polymers and plasticizing agents and a method of enteric coating dosage forms using same
    Patent number: 4377568
    Abstract: An enteric coating medium for solid medicinal dosage units is prepared by precipitation of a pH sensitive polymer from an alcoholic solution of such a polymer and a plasticizing agent to produce a suspension of fine particles of a mixture of polymer and plasticizing agent.
    Type: Grant
    Filed: August 12, 1981
    Date of Patent: March 22, 1983
    Assignee: Merck Sharp & Dohme (I.A.) Corp.
    Inventor: Sham K. Chopra