Patents by Inventor Robert O. Williams

Robert O. Williams 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: 20140030340
    Abstract: A method for preparing poorly water soluble drug particles is disclosed. The method comprises dissolving a drug in at least one organic solvent to form a drug/organic mixture, spraying the drug/organic mixture into an aqueous solution and concurrently evaporating the organic solvent in the presence of the aqueous solution to form an aqueous dispersion of the drug particles. The resulting drug particles are in the nanometer to micrometer size range and show enhanced dissolution rates and reduced crystallinity when compared to the unprocessed drug. The present invention additionally contemplates products and processes for new drug formulations of insoluble drug particles having high dissolution rates and extremely high drug-to-excipient ratios.
    Type: Application
    Filed: October 3, 2013
    Publication date: January 30, 2014
    Applicant: BOARD OF REGENTS, THE UNIVERSITY OF TEXAS SYSTEM
    Inventors: Keith P. Johnston, Robert O. Williams, III, Xiaoxia Chen
  • Publication number: 20130303630
    Abstract: Compositions and methods for making a pharmaceutical dosage form include making a pharmaceutical composition that includes one or more active pharmaceutical ingredients (API) with one or more pharmaceutically acceptable excipients by thermokinetic compounding into a composite. Compositions and methods of preprocessing a composite comprising one or more APIs with one or more excipients include thermokinetic compounding, comprising thermokinetic processing the APIs with the excipients into a composite, wherein the composite can be further processed by conventional methods known in the art, such as hot melt extrusion, melt granulation, compression molding, tablet compression, capsule filling, film-coating, or injection molding.
    Type: Application
    Filed: July 15, 2013
    Publication date: November 14, 2013
    Inventors: Chris Brough, James W. McGinity, Dave A. Miller, James C. DiNunzio, Robert O. Williams, III
  • Patent number: 8551526
    Abstract: A method for preparing poorly water soluble drug particles is disclosed. The method comprises dissolving a drug in at least one organic solvent to form a drug/organic mixture, spraying the drug/organic mixture into an aqueous solution and concurrently evaporating the organic solvent in the presence of the aqueous solution to form an aqueous dispersion of the drug particles. The resulting drug particles are in the nanometer to micrometer size range and show enhanced dissolution rates and reduced crystallinity when compared to the unprocessed drug. The present invention additionally contemplates products and processes for new drug formulations of insoluble drug particles having high dissolution rates and extremely high drug-to-excipient ratios.
    Type: Grant
    Filed: October 8, 2002
    Date of Patent: October 8, 2013
    Assignee: Board of Regents, The University of Texas System
    Inventors: Keith P. Johnston, Robert O. Williams, III, Xiaoxia Chen
  • Patent number: 8486423
    Abstract: Compositions and methods for making a pharmaceutical dosage form include making a pharmaceutical composition that includes one or more active pharmaceutical ingredients (API) with one or more pharmaceutically acceptable excipients by thermokinetic compounding into a composite. Compositions and methods of preprocessing a composite comprising one or more APIs with one or more excipients include thermokinetic compounding, comprising thermokinetic processing the APIs with the excipients into a composite, wherein the composite can be further processed by conventional methods known in the art, such as hot melt extrusion, melt granulation, compression molding, tablet compression, capsule filling, film-coating, or injection molding.
    Type: Grant
    Filed: August 21, 2008
    Date of Patent: July 16, 2013
    Assignees: Board of Regents, The University of Texas System, Integrico Composites, Inc.
    Inventors: Chris Brough, James W. McGinity, Dave A. Miller, James DiNunzio, Robert O. Williams
  • Publication number: 20120251595
    Abstract: The present invention relates to methods and compositions to prepare small size particles of poorly water soluble agents or drugs with surface enriched hydrophilicity.
    Type: Application
    Filed: November 9, 2010
    Publication date: October 4, 2012
    Applicant: BOARD OF REGENTS, THE UNIVERSITY OF TEXAS SYSTEM
    Inventors: Robert O. Williams, III, Keat Theng Chow
  • Publication number: 20110224232
    Abstract: A method of treating fungal infection by pulmonary administration of a solution of voriconazole and cyclodextrin is provided The fungal infection can be a pulmonary infection. The solution can be an inhalable aqueous formulation that can be administered via the mouth or nose. The cyclodextrin can be a water soluble cyclodextrin derivative such as sulfoalkyl ether cyclodextrin. The formulation can be administered via a spray device or nebulizer.
    Type: Application
    Filed: May 6, 2009
    Publication date: September 15, 2011
    Applicants: Board of Regents, The University of Texas System, CyDex Pharmaceuticals, Inc.
    Inventors: Robert O. Williams III, Rupert O. Zimmerer, Jason T. MxConville, Justin A. Tolman, Nathan P. Wiederhold, Jay I. Peters
  • Publication number: 20110182946
    Abstract: The present invention provides a composition and method of forming an amorphous drug-loaded particle by forming one or more amorphous drug-loaded nanoparticles comprising one or more active agents stabilized by one or more polymers, desolvating the one or more amorphous drug-loaded nanoparticles to form one or more flocculated amorphous drug-loaded nanoparticles, filtering the one or more flocculated amorphous drug-loaded nanoparticles and drying the one or more flocculated amorphous drug-loaded nanoparticles to form amorphous drug-loaded particles.
    Type: Application
    Filed: March 17, 2009
    Publication date: July 28, 2011
    Applicant: BOARD OF REGENTS, THE UNIVERSITY OF TEXAS SYSTEM
    Inventors: Keith P. Johnston, Robert O. Williams, III, Michal E. Matteucci
  • Publication number: 20100183721
    Abstract: The present invention includes compositions and methods for making and using a rapid dissolving, high potency, substantially amorphous nanostructured aggregate for pulmonary delivery of tacrolimus and a stabilizer matrix comprising, optionally, a polymeric or non-polymeric surfactant, a polymeric or non-polymeric saccharide or both, wherein the aggregate comprises a surface area greater than 5 m2/g as measured by BET analysis and exhibiting supersaturation for at least 0.5 hours when 11-15-times the aqueous crystalline solubility of tacrolimus is added to simulated lung fluid.
    Type: Application
    Filed: January 10, 2008
    Publication date: July 22, 2010
    Applicant: Board of Regents, The University of Texas System
    Inventors: Robert O. Williams, Keith P. Johnston, Prapasri Sinswat, Jason T. McConville, Robert Talbert, Jay I. Peters, Alan B. Watts, True L. Rogers
  • Publication number: 20090053315
    Abstract: Compositions and methods for making a pharmaceutical dosage form include making a pharmaceutical composition that includes one or more active pharmaceutical ingredients (API) with one or more pharmaceutically acceptable excipients by thermokinetic compounding into a composite. Compositions and methods of preprocessing a composite comprising one or more APIs with one or more excipients include thermokinetic compounding, comprising thermokinetic processing the APIs with the excipients into a composite, wherein the composite can be further processed by conventional methods known in the art, such as hot melt extrusion, melt granulation, compression molding, tablet compression, capsule filling, film-coating, or injection molding.
    Type: Application
    Filed: August 21, 2008
    Publication date: February 26, 2009
    Applicant: BOARD OF REGENTS, THE UNIVERSITY OF TEXAS SYSTEM
    Inventors: Chris Brough, James W. McGinity, Dave A. Miller, James C. DiNunzio, Robert O. Williams
  • Publication number: 20080274194
    Abstract: A hot-melt extruded composition having finely divided drug-containing particles dispersed within a polymeric and/or lipophyllic carrier matrix is provided. The carrier softens or melts during hot-melt extrusion but it does not dissolve the drug-containing particles during extrusion. As a result, a majority or at least 90% wt. of the drug-containing particles in the extrudate are deaggregated during extrusion into essentially primary crystalline and/or amorphous particles. PEO is a suitable carrier material for drugs insoluble in the solid state in this carrier. Various functional excipients can be included in the carrier system to stabilize the particle size and physical state of the drug substance in either a crystalline and/or amorphous state. The carrier system is comprised of at least one thermal binder, and may also contain various functional excipients, such as: super-disintegrants, antioxidants, surfactants, wetting agents, stabilizing agents, retardants, or similar functional excipients.
    Type: Application
    Filed: November 9, 2005
    Publication date: November 6, 2008
    Applicant: BOARD OF REGENTS, THE UNIVERSITY OF TEXAS SYSTEM
    Inventors: Dave A. Miller, Jason T. McConville, James W. McGinity, Robert O. Williams
  • Patent number: 6862890
    Abstract: The present invention provides a system and a method for the production of microparticles and nanoparticles of materials that can be dissolved. The system and method of the present invention provide quicker freezing times, which in turn produces a more uniform distribution of particle sizes, smaller particles, particles with increased porosity and a more intimate mixing of the particle components. The system and method of the present invention also produce particles with greater surface area than conventional methods. One form of the present invention provides a method for the preparation of particles. An effective ingredient is mixed with water, one or more solvents, or a combination thereof, and the resulting mixture is sprayed through an insulating nozzle located at or below the level of a cryogenic liquid. The spray generates frozen particles.
    Type: Grant
    Filed: January 30, 2002
    Date of Patent: March 8, 2005
    Assignee: Board of Regents, University of Texas System
    Inventors: Robert O. Williams, III, Keith P. Johnston, Timothy J. Young, True L. Rogers, Melisa K. Barron, Zhongshui Yu, Jiahui Hu
  • Patent number: 6756062
    Abstract: A method for preparing poorly water soluble drug particles is disclosed. The method comprises dissolving a drug in at least one organic solvent to form a drug/organic mixture, spraying the drug/organic mixture into an aqueous solution, and concurrently evaporating the organic solvent in the presence of the aqueous solution to form an aqueous dispersion of the drug particles. The resulting drug particles are in the nanometer to micrometer size range and show enhanced dissolution rates and reduced crystallinity when compared to the unprocessed drug.
    Type: Grant
    Filed: March 14, 2001
    Date of Patent: June 29, 2004
    Assignee: Board of Regents University of Texas System
    Inventors: Keith P. Johnston, Robert O. Williams, Timothy J. Young, Xiaoxia Chen
  • Publication number: 20040076648
    Abstract: Topical compositions and methods for treating pain. The invention provides oil-in-water emulsions comprising an antidepressant; an NMDA-receptor antagonists; a lipophilic component; water; and a surfactant. The compositions induce a local-anesthetic effect when topically administered to intact skin thereby treating or preventing pain, for example, neuropathic pain.
    Type: Application
    Filed: September 25, 2003
    Publication date: April 22, 2004
    Applicant: EpiCept Corporation
    Inventors: Robert O. Williams, Feng Zhang
  • Publication number: 20040067251
    Abstract: A method for preparing poorly water soluble drug particles is disclosed. The method comprises dissolving a drug in at least one organic solvent to form a drug/organic mixture, spraying the drug/organic mixture into an aqueous solution and concurrently evaporating the organic solvent in the presence of the aqueous solution to form an aqueous dispersion of the drug particles. The resulting drug particles are in the nanometer to micrometer size range and show enhanced dissolution rates and reduced crystallinity when compared to the unprocessed drug. The present invention additionally contemplates products and processes for new drug formulations of insoluble drug particles having high dissolution rates and extremely high drug-to-excipient ratios.
    Type: Application
    Filed: October 8, 2002
    Publication date: April 8, 2004
    Applicant: Dow Chemical Company
    Inventors: Keith P. Johnston, Robert O. Williams, Xiaoxia Chen
  • Publication number: 20040022861
    Abstract: The present invention provides a system and a method for the production of microparticles and nanoparticles of materials that can be dissolved. The system and method of the present invention provide quicker freezing times, which in turn produces a more uniform distribution of particle sizes, smaller particles, particles with increased porosity and a more intimate mixing of the particle components. The system and method of the present invention also produce particles with greater surface area than conventional methods. One form of the present invention provides a method for the preparation of particles. An effective ingredient is mixed with water, one or more solvents, or a combination thereof, and the resulting mixture is sprayed through an insulating nozzle located at or below the level of a cryogenic liquid. The spray generates frozen particles.
    Type: Application
    Filed: October 18, 2002
    Publication date: February 5, 2004
    Inventors: Robert O. Williams, Keith P. Johnston, Timothy J. Young, True L. Rogers, Melisa K. Barron, Zhongshui Yu, Jiahui Hu
  • Patent number: 6638981
    Abstract: Topical compositions and methods for treating pain. The invention provides oil-in-water emulsions comprising an antidepressant; an NMDA-receptor antagonists; a lipophilic component; water; and a surfactant. The compositions induce a local-anesthetic effect when topically administered to intact skin thereby treating or preventing pain, for example, neuropathic pain.
    Type: Grant
    Filed: August 17, 2001
    Date of Patent: October 28, 2003
    Assignee: EpiCept Corporation
    Inventors: Robert O. Williams, Feng Zhang
  • Publication number: 20030124190
    Abstract: Compositions useful for long-lasting pain relief from mucosal damage, such as mucosal inflamation, abrasions, ulcerations, lesions, trauma and incisions, without significant systemic absorption. The compositions of the invention are particularly suitable for application to the mucous membrane of the nasal cavity and buccal cavity. To relieve pain, the compositions or the invention are topically applied directly to the affected area.
    Type: Application
    Filed: January 21, 2003
    Publication date: July 3, 2003
    Applicant: EpiCept, Inc.
    Inventors: Robert O. Williams, Feng Zhang, John J. Koleng, Gavril W. Pasternak, Yuri A. Kolesnikov
  • Publication number: 20030082214
    Abstract: Topical compositions and methods for treating pain. The invention provides oil-in-water emulsions comprising an antidepressant; an NMDA-receptor antagonists; a lipophilic component; water; and a surfactant. The compositions induce a local-anesthetic effect when topically administered to intact skin thereby treating or preventing pain, for example, neuropathic pain.
    Type: Application
    Filed: August 17, 2001
    Publication date: May 1, 2003
    Inventors: Robert O. Williams, Feng Zhang
  • Publication number: 20030059376
    Abstract: A formulation for non-invasive delivery of pharmaceutical agents, particularly proteins and peptides, by absorption through a membrane at a targeted site is provided, along with a process of making the formulation. The formulation comprises a suspension of solid-phase dehydrated particles in a delivery medium. The particles comprise the dehydration product of the pharmaceutical agent and at least one of a surfactant and permeation enhancer, and the delivery medium preferably comprises a propellant for pressurized aerosol delivery of the formulation. The formulation can be conveniently delivered to the patient's targeted site where the pharmaceutical agent is absorbed through the mucosa to achieve a desired bioavailability.
    Type: Application
    Filed: August 16, 2002
    Publication date: March 27, 2003
    Inventors: Miles A. Libbey, Randall McCoy, Robert O. Williams
  • Patent number: 6531112
    Abstract: The present invention provides a non-invasive method for administering polypeptides across epithelial membranes. The formulations in the present invention comprise solid polypeptide particles mixed with a permeation enhancer and excipients which are dispersed in a media for oral or intranasal administration. Also provided in the present invention is a process to prepare the formulations.
    Type: Grant
    Filed: May 14, 2001
    Date of Patent: March 11, 2003
    Assignee: DelRx Pharmaceutical Corporation
    Inventors: Randall E. McCoy, Robert O. Williams, III, Miles A. Libbey, III