Patents by Inventor William B. Caldwell

William B. Caldwell 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).

  • Hydroxypropyl methyl cellulose acetate succinate with enhanced acetate and succinate substitution
    Patent number: 9040033
    Abstract: Disclosed are polymers of hydroxypropyl methyl cellulose acetate succinate (HPMCAS) with unique degrees of substitution of hydroxypropoxy, methoxy, acetyl, and succinoyl groups. When used in making compositions comprising a low-solubility active agent and such polymers, the polymers provide increased aqueous concentrations and/or improved physical stability of the active agent.
    Type: Grant
    Filed: June 13, 2011
    Date of Patent: May 26, 2015
    Inventors: Warren K. Miller, David K. Lyon, Dwayne T. Friesen, William B. Caldwell, David T. Vodak, Daniel E. Dobry
  • Pharmaceutical compositions of semi-ordered drugs and polymers
    Patent number: 8491933
    Abstract: A solid composition of a low-solubility drug and a concentration-enhancing polymer has a portion of the drug in a semi-ordered state.
    Type: Grant
    Filed: August 23, 2012
    Date of Patent: July 23, 2013
    Assignee: Bend Research, Inc.
    Inventors: Walter C. Babcock, William B. Caldwell, Marshall D. Crew, Dwayne T. Friesen, Ravi M. Shanker, Daniel T. Smithey
  • HYDROXYPROPYL METHYL CELLULOSE ACETATE SUCCINATE WITH ENHANCED ACETATE AND SUCCINATE SUBSTITUTION
    Publication number: 20130102691
    Abstract: Disclosed are polymers of hydroxypropyl methyl cellulose acetate succinate (HPMCAS) with unique degrees of substitution of hydroxypropoxy, methoxy, acetyl, and succinoyl groups. When used in making compositions comprising a low-solubility active agent and such polymers, the polymers provide increased aqueous concentrations and/or improved physical stability of the active agent.
    Type: Application
    Filed: June 13, 2011
    Publication date: April 25, 2013
    Applicant: DOW GLOBAL TECHNOLOGIES LLC
    Inventors: Warren K. Miller, David K. Lyon, Dwayne T. Friesen, William B. Caldwell, David T. Vodak, Daniel E. Dobry
  • PHARMACEUTICAL COMPOSITIONS OF SEMI-ORDERED DRUGS AND POLYMERS
    Publication number: 20120322805
    Abstract: A solid composition of a low-solubility drug and a concentration-enhancing polymer has a portion of the drug in a semi-ordered state.
    Type: Application
    Filed: August 23, 2012
    Publication date: December 20, 2012
    Applicant: BEND RESEARCH, INC.
    Inventors: Walter C. Babcock, William B. Caldwell, Marshall D. Crew, Dwayne T. Friesen, Ravi M. Shanker, Daniel T. Smithey
  • Pharmaceutical compositions of semi-ordered drugs and polymers
    Patent number: 8257739
    Abstract: A solid composition of a low-solubility drug and a concentration-enhancing polymer has a portion of the drug in a semi-ordered state.
    Type: Grant
    Filed: August 5, 2003
    Date of Patent: September 4, 2012
    Assignee: Bend Research, Inc.
    Inventors: Walter C. Babcock, William B. Caldwell, Marshall D. Crew, Dwayne T. Friesen, Ravi M. Shanker, Daniel T. Smithey
  • Pharmaceutical compositions of semi-ordered drugs and polymers
    Publication number: 20040156905
    Abstract: A solid composition of a low-solubility drug and a concentration-enhancing polymer has a portion of the drug in a semi-ordered state.
    Type: Application
    Filed: August 5, 2003
    Publication date: August 12, 2004
    Applicant: Pfizer Inc.
    Inventors: Walter C. Babcock, William B. Caldwell, Marshall D. Crew, Dwayne T. Friesen, Ravi M. Shanker, Daniel T. Smithey