Patents by Inventor Mark D. Coffin

Mark D. Coffin 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).

  • Ranitidine solid dosage form
    Patent number: 5407687
    Abstract: The present invention comprises a bi-layer, pharmaceutical tablet having one layer formulated for the immediate release (IR) of ranitidine and a second layer formulated for sustained release (SR) of ranitidine with the ratio of ranitidine in the IR layer to that in the SR in the range of from about 30:70 to about 60:40.
    Type: Grant
    Filed: February 22, 1994
    Date of Patent: April 18, 1995
    Assignee: Glaxo Inc.
    Inventors: Mark D. Coffin, Alan F. Parr