Patents by Inventor Ernest S. Quan

Ernest S. Quan 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).

  • Patent number: 7438924
    Abstract: This invention relates to a pharmaceutical formulation, in the form of a tablet, sachet or powder for suspension dosage form, which comprises dry granulated particles of a non-dihydrate form of azithromycin and, optionally, one or more pharmaceutically acceptable excipients. Preferably, the pharmaceutical formulation is a tablet containing between about 40%, by weight, to about 90%, by weight, non-dihydrate azithromycin. More preferably, the pharmaceutical formulation contains non-dihydrate azithromycin selected from the forms B, D, E, F, G, H, J, M, N, O, P, Q, R, or mixtures thereof. Even more preferably, the invention relates to a pharmaceutical formulation wherein the dosage of azithromycin is 250 mgA, 500 mgA, 600 mgA or 1000 mgA. The present invention further relates to a dry granulated azithromycin particle, comprising a form of azithromycin, selected from forms D, E, F, G, H, J, M, N, O, P, Q, R and mixtures of non-dihydrate forms, and at least one pharmaceutically acceptable excipient.
    Type: Grant
    Filed: January 31, 2003
    Date of Patent: October 21, 2008
    Assignee: Pfizer Inc
    Inventors: Barbara A. Johnson, Ernest S. Quan
  • Publication number: 20030228357
    Abstract: This invention relates to a pharmaceutical formulation, in the form of a tablet, sachet or powder for suspension dosage form, which comprises dry granulated particles of a non-dihydrate form of azithromycin and, optionally, one or more pharmaceutically acceptable excipients. Preferably, the pharmaceutical formulation is a tablet containing between about 40%, by weight, to about 90%, by weight, non-dihydrate azithromycin.
    Type: Application
    Filed: January 31, 2003
    Publication date: December 11, 2003
    Applicant: Pfizer Inc.
    Inventors: Barbara A. Johnson, Ernest S. Quan
  • Publication number: 20030180360
    Abstract: The present invention is directed to controlled-release (CR) oral pharmaceutical dosage forms of 5,8,14-triazatetracyclo[10.3.1.02,11.04,9]-hexadeca-2(11),3,5,7,9-pentaene, 1, and pharmaceutically acceptable salts thereof, and methods of using them to reduce nicotine addiction or aiding in the cessation or lessening of tobacco use while reducing nausea as an adverse effect. The present invention also relates to an immediate-release (IR) low dosage composition having a stable formulation with uniform drug distribution and potency.
    Type: Application
    Filed: November 20, 2002
    Publication date: September 25, 2003
    Applicant: Pfizer Inc.
    Inventors: Mary T. Am Ende, Michael C. Roy, Scott W. Smith, Kenneth C. Waterman, Ernest S. Quan, Sara Kristen Moses
  • Patent number: 6190351
    Abstract: A nutritional system is disclosed, for delivering a colorant dye to a nutritional fluid that flows through the nutritional system.
    Type: Grant
    Filed: June 9, 1999
    Date of Patent: February 20, 2001
    Assignee: ALZA Corporation
    Inventors: Richard G. Weyers, Atul D. Ayer, Brenda J. Pollock, Brian L. Barclay, Ernest S. Quan
  • Patent number: 5925015
    Abstract: A nutritional system is disclosed, for delivering a colorant dye to a nutritional fluid that flows through the nutritional system.
    Type: Grant
    Filed: May 20, 1997
    Date of Patent: July 20, 1999
    Assignee: ALZA Corporation
    Inventors: Richard G. Weyers, Atul D. Ayer, Brenda J. Pollock, Brian L. Barclay, Ernest S. Quan
  • Patent number: 5178867
    Abstract: The invention pertains to a dosage form for orally administering a drug in eight hours or less to the stomach and small intestine for a therapeutic result.
    Type: Grant
    Filed: August 19, 1991
    Date of Patent: January 12, 1993
    Assignee: Alza Corporation
    Inventors: George V. Guittard, Howard A. Carpenter, Ernest S. Quan, Patrick S. Wong, Lawrence G. Hamel