Patents by Inventor Dwayne T. Friesen

Dwayne T. Friesen 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).

  • Publication number: 20110294902
    Abstract: A drug in a solubility-improved form is combined with a concentration-enhancing polymer in a sufficient amount so that the combination provides substantially enhanced drug concentration in a use environment relative to a control comprising the same amount of the same solubility-improved form of drug without the concentration-enhancing polymer.
    Type: Application
    Filed: August 11, 2011
    Publication date: December 1, 2011
    Inventors: William J. CURATOLO, Ravi M. Shanker, Walter C. Babccck, Dwayne T. Friesen, James A.S. Nightingale, Douglas A. Lorenz
  • Patent number: 8048452
    Abstract: A pharmaceutical composition comprises a solid amorphous dispersion of a cholesteryl ester transfer protein inhibitor and a concentration-enhancing polymer.
    Type: Grant
    Filed: June 2, 2006
    Date of Patent: November 1, 2011
    Assignee: Bend Research, Inc.
    Inventors: William J. Curatolo, Dwayne T. Friesen, Michael J. Gumkowski, Douglas A. Lorenz, James A. S. Nightingale, Roger B. Ruggeri, Ravi M. Shanker
  • Patent number: 8026286
    Abstract: A drug in a solubility-improved form is combined with a concentration-enhancing polymer in a sufficient amount so that the combination provides substantially enhanced drug concentration in a use environment relative to a control comprising the same amount of the same solubility-improved form of drug without the concentration-enhancing polymer.
    Type: Grant
    Filed: December 20, 2000
    Date of Patent: September 27, 2011
    Assignee: Bend Research, Inc.
    Inventors: William J. Curatolo, Ravi M. Shanker, Walter C. Babcock, Dwayne T. Friesen, James A. S. Nightingale, Douglas A. Lorenz
  • Publication number: 20110182947
    Abstract: A controlled release dosage form has a coated core with the core comprising a drug-containing composition and a water-swellable composition, each occupying separate regions within the core. The drug-containing composition comprises a low-solubility drug and a drug-entraining agent. The coating around the core is water-permeable, water-insoluble and has at least one delivery port therethrough. A variety of formulations having specific drug release profiles are disclosed.
    Type: Application
    Filed: December 27, 2010
    Publication date: July 28, 2011
    Inventors: Leah E. Appel, Ronald A. Beyerinck, Mark B. Chidlaw, William J. Curatolo, Dwayne T. Friesen, Kelly L. Smith, Avinash G. Thombre
  • Patent number: 7951403
    Abstract: A process for forming drug multiparticulates having improved drug crystallinity is disclosed, comprising modifying a conventional melt-congeal process by adding a volatile cospecies either to the molten mixture or to the process atmosphere, or to both.
    Type: Grant
    Filed: December 3, 2004
    Date of Patent: May 31, 2011
    Assignee: Pfizer Inc.
    Inventors: Dwayne T. Friesen, Marshall D. Crew, Roderick J. Ray, Leah E. Appel
  • Patent number: 7897175
    Abstract: A dosage form comprises (1) a solid amorphous dispersion comprising a cholesterol ester transfer protein inhibitor and an acidic concentration-enhancing polymer and (2) an HMG-CoA reductase inhibitor. The solid amorphous dispersion and the HMG-CoA reductase inhibitor are combined in the dosage form so that the solid amorphous dispersion and the HMG-CoA reductase inhibitor are substantially separate from one another in the dosage form.
    Type: Grant
    Filed: December 18, 2003
    Date of Patent: March 1, 2011
    Assignee: Bend Research, Inc.
    Inventors: Dwayne T. Friesen, David K. Lyon, Douglas A. Lorenz, Bruno C. Hancock, Timothy J. McDermott, Ravi M. Shanker
  • Patent number: 7887844
    Abstract: A multiparticulate for controlled release of a drug comprises crystalline drug, a glyceride having at least one alkylate substituent of at least 16 carbon atoms, and a poloxamer, wherein at least 70 wt % of the drug in the multiparticulate is crystalline.
    Type: Grant
    Filed: December 3, 2004
    Date of Patent: February 15, 2011
    Assignee: Pfizer Inc.
    Inventors: Leah E. Appel, Roderick J. Ray, David K. Lyon, James B. West, Scott B. McCray, Marshall D. Crew, Dwayne T. Friesen, Scott M. Herbig, Julian B. Lo
  • Patent number: 7887840
    Abstract: A solubility-improved drug form is combined with a concentration-enhancing polymer in a sufficient amount so that the combination provides substantially enhanced drug concentration in a use environment relative to a control comprising the same amount of the same drug form without the concentration-enhancing polymer.
    Type: Grant
    Filed: June 20, 2002
    Date of Patent: February 15, 2011
    Assignee: Bend Research, Inc.
    Inventors: William J. Curatolo, Dwayne T. Friesen
  • Publication number: 20100256110
    Abstract: A composition comprises a solid dispersion comprising a low-solubility drug and at least one polymer. At least a major portion of the drug in the dispersion is amorphous. The polymer has a glass transition temperature of at least 100° C. measured at a relative humidity of fifty percent. Another aspect of the invention comprises the same composition except that the dispersion has a glass transition temperature of at least 50° C. at a relative humidity of fifty percent. In another aspect of the invention, a composition comprises a solid dispersion comprising a low-solubility drug and a stabilizing polymer. At least a major portion of the drug in the dispersion is amorphous. The composition also includes a concentration-enhancing polymer that increases the concentration of the drug in a use environment. The stabilizing polymer has a glass transition temperature that is greater than the glass transition temperature of the concentration-enhancing polymer at a relative humidity of 50%.
    Type: Application
    Filed: May 25, 2010
    Publication date: October 7, 2010
    Inventors: Walter C. Babcock, Dwayne T. Friesen, James A.S. Nightingale, Ravi M. Shanker
  • Publication number: 20100215747
    Abstract: A pharmaceutical composition comprises nanoparticles comprising ionizable, poorly water soluble cellulosic polymers.
    Type: Application
    Filed: June 30, 2008
    Publication date: August 26, 2010
    Inventors: Corey Jay Bloom, Marshall David Crew, Dwayne T. Friesen, Warren Kenyon Miller, Michael Mark Morgen, Daniel Tod Smithey
  • Patent number: 7625507
    Abstract: Reduced levels of drug degradation in drug-containing multiparticulates are obtained by an extrusion/melt-congeal process.
    Type: Grant
    Filed: December 3, 2004
    Date of Patent: December 1, 2009
    Assignee: Pfizer Inc.
    Inventors: Roderick J. Ray, Leah E. Appel, David D. Newbold, Dwayne T. Friesen, Scott B. McCray, David K. Lyon, James B. West, Marshall D. Crew, Joshua R. Shockey
  • Publication number: 20090142404
    Abstract: A dosage form comprises a low-solubility drug, and a precipitation-inhibiting polymer. The drug is in a solubility-improved form and in the form of particles at least partially coated with the precipitation-inhibiting polymer. Exemplified low-solubility drugs are ziprasidone and sildenafil. Exemplified precipitation-inhibiting polymer is HPMCAS.
    Type: Application
    Filed: August 18, 2005
    Publication date: June 4, 2009
    Inventors: Leah E. Appel, Walter C. Babcock, Dwayne T. Friesen, Roderick J. Ray, Daniel T. Smithey, Sheri L. Shamblin, Ravi M. Shanker
  • Publication number: 20090011024
    Abstract: A pharmaceutical composition comprises a dispersion comprising a low-solubility drug and a matrix combined with a concentration-enhancing polymer. At least a major portion of the drug is amorphous in the dispersion. The compositions improve the stability of the drug in the dispersion, and/or the concentration of drug in a use environment.
    Type: Application
    Filed: July 8, 2008
    Publication date: January 8, 2009
    Inventors: Walter C. Babcock, William J. Curatolo, Dwayne T. Friesen, Rodney J. Ketner, Julian B. Lo, James A.S. Nightingale, Ravi M. Shanker, James B. West
  • Publication number: 20080317851
    Abstract: High loading immediate release dosage forms containing at least 30 wt % of a solid drug dispersion, at least 5 wt % of a disintegrant and a porosigen are disclosed that exhibit excellent strength and aqueous solubility.
    Type: Application
    Filed: October 30, 2007
    Publication date: December 25, 2008
    Inventors: Leah E. Appel, John E. Byers, Marshall D. Crew, Dwayne T. Friesen, Bruno C. Hancock, Stephen J. Schadtle
  • Publication number: 20080299188
    Abstract: A controlled release dosage form comprises an immediate release portion and an enteric coated sustained release core.
    Type: Application
    Filed: May 14, 2007
    Publication date: December 4, 2008
    Inventors: Leah E. Appel, Dwayne T. Friesen, Scott M. Herbig, Avinash G. Thombre
  • Publication number: 20080293801
    Abstract: A composition comprises a solid amorphous dispersion comprising (S)—N-{2-[benzyl(methyl)amino]-2-oxo-1-phenylethyl}-methyl-5-[4?-(trifluoromethyl)[1,1?-biphenyl]-2-carboxamido]-1H-indole-2-carboxamide and a polymer.
    Type: Application
    Filed: November 1, 2004
    Publication date: November 27, 2008
    Inventors: Dwayne T. Friesen, Ravi M. Shanker
  • Publication number: 20080292707
    Abstract: Pharmaceutical compositions comprise a low-solubility drug adsorbed onto a high surface area substrate to form an adsorbate. The compositions in some embodiments include a concentration-enhancing polymer.
    Type: Application
    Filed: July 28, 2008
    Publication date: November 27, 2008
    Inventors: Walter C. Babcock, Dwayne T. Friesen, Ravi M. Shanker, Daniel T. Smithey, Ralph Tadday
  • Publication number: 20080262107
    Abstract: Disclosed are polymers of hydroxypropyl methyl cellulose acetate succinate (HPMCAS) and hydroxypropyl methyl cellulose acetate (HPMCA) with unique degrees of substitution of hydroxypropoxy, methoxy, acetyl, and succinoyl groups. When used in making compositions comprising a low-solubility drug and such polymers, the polymers provide enhanced aqueous concentrations and/or improved physical stability.
    Type: Application
    Filed: May 18, 2005
    Publication date: October 23, 2008
    Applicant: PFIZER PRODUCTS INC.
    Inventors: Walter C. Babcock, Dwayne T. Friesen, David Keith Lyon, Warren Kenyon Miller, Daniel Tod Smithey
  • Publication number: 20080199527
    Abstract: A pharmaceutical composition is disclosed which comprises multiparticulates wherein said multiparticulates further comprise an azithromycin core and an enteric coating disposed upon said azithromycin core.
    Type: Application
    Filed: December 9, 2005
    Publication date: August 21, 2008
    Applicant: Pfizer Inc.
    Inventors: William J. Curatolo, Scott M. Herbig, Steven R. LeMott, Julian B. Lo, Leah E. Appel, Dwayne T. Friesen, David K. Lyon, Scott B. McCray, James B. West
  • Patent number: 7235259
    Abstract: A pharmaceutical composition comprises a solid amorphous dispersion of a cholesteryl ester transfer protein inhibitor and a concentration-enhancing polymer.
    Type: Grant
    Filed: February 1, 2002
    Date of Patent: June 26, 2007
    Assignee: Pfizer Inc
    Inventors: Marshall D. Crew, William J. Curatolo, Dwayne T. Friesen, Michael Jon Gumkowski, Douglas A. Lorenz, James A. S. Nightingale, Roger B. Ruggeri, Ravi M. Shanker