Patents by Inventor David William Bristol

David William Bristol 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: 9421266
    Abstract: Drug substances comprising a amine containing pharmaceutically active compound, and at least one of an alditol acetal and an aromatic organic acid as an addition salt or an additive.
    Type: Grant
    Filed: December 21, 2012
    Date of Patent: August 23, 2016
    Assignee: Pisgah Laboratories, Inc.
    Inventors: Clifford Riley King, David William Bristol, Michael L. English
  • Patent number: 8883863
    Abstract: A pharmaceutical drug product with at least one drug substance capable of providing immediate release or modified release profiles. The drug substance is selected from an amorphous form with an active pharmaceutical ingredient and a first organic counterion wherein the amorphous form has a phase transition temperature of at least 100° C.; and a morphological form with the active pharmaceutical ingredient and a second organic counterion wherein the morphological form of the drug substance has a phase transition temperature of at least 100° C.
    Type: Grant
    Filed: December 21, 2012
    Date of Patent: November 11, 2014
    Assignee: Pisgah Laboratories, Inc.
    Inventors: Clifford Riley King, David William Bristol, Michael L. English
  • Patent number: 8859622
    Abstract: Drug substances comprising a pharmaceutically acceptable organic acid addition salt of amine containing pharmaceutically active compounds useful for the treatment of a therapeutic ailment administration and exhibiting prophylactic properties when employed in non-therapeutic administration.
    Type: Grant
    Filed: April 3, 2008
    Date of Patent: October 14, 2014
    Assignee: Pisgah Laboratories, Inc.
    Inventors: David William Bristol, Clifford Riley King, Joseph Pike Mitchener, Jr., Vicki Haynes Audia
  • Publication number: 20130338229
    Abstract: Provided is a drug substance and a method of treating an ailment comprising administering an oral dose of a drug product comprising the drug substance wherein the drug substance comprises an organic acid addition salt of methadone. The organic acid addition salt is selected from the group consisting of pamoate and xinafoate wherein the drug substance is bioavailable under gastrointestinal administration but is not bioavailable under administration at a mucosal membrane other than gastrointestinal or release from a depot injectable product.
    Type: Application
    Filed: July 29, 2013
    Publication date: December 19, 2013
    Applicant: Pisgah National Laboratories, Inc.
    Inventors: Clifford Riley King, Stephen G. D'Ambrosio, David William Bristol, Michael L. English
  • Patent number: 8575151
    Abstract: Drug substances comprising a pharmaceutically acceptable organic acid addition salt of amine containing pharmaceutically active compounds useful for the treatment of a therapeutic ailment administration and exhibiting prophylactic properties when employed in non-therapeutic administration.
    Type: Grant
    Filed: April 3, 2008
    Date of Patent: November 5, 2013
    Assignee: Pisgah National Laboratories, Inc.
    Inventors: David William Bristol, Clifford Riley King, Joseph Pike Mitchener, Jr., Vicki Haynes Audia
  • Patent number: 8334322
    Abstract: Drug substances comprising a pharmaceutically acceptable organic acid addition salt of amine containing pharmaceutically active compounds useful for the treatment of a therapeutic ailment administration and exhibiting prophylactic properties when employed in non-therapeutic administration.
    Type: Grant
    Filed: December 22, 2011
    Date of Patent: December 18, 2012
    Assignee: Pisgah Laboratories, LLC
    Inventors: David William Bristol, Clifford Riley King, Joseph Pike Mitchener, Jr., Vicki Haynes Audia
  • Patent number: 8039461
    Abstract: An amorphous form of imipramine pamoate, morphologically pure forms, and mixtures of amorphous and morphologically pure imipramine pamoate characterized by differential scanning calorimetry, fourier transform infrared, and powder x-ray diffraction, and pharmaceutical compositions formed therefrom.
    Type: Grant
    Filed: August 23, 2007
    Date of Patent: October 18, 2011
    Assignee: Pisgah Laboratories, Inc.
    Inventors: Vicki Haynes Audia, David William Bristol, Joseph Pike Mitchener, Jr., Clifford Riley King
  • Patent number: 7858663
    Abstract: A pharmaceutical composition comprising the salt of a thyroid hormone selected from the group consisting of levothyroxine and liothyronine and an organic acid comprising at least one aromatic ring having at least one hydroxyl moiety and at least one carboxylic acid moiety in an ortho relationship.
    Type: Grant
    Filed: October 31, 2007
    Date of Patent: December 28, 2010
    Assignee: Pisgah Laboratories, Inc.
    Inventors: David William Bristol, Clifford Riley King, Vicki Haynes Audia
  • Patent number: 7718649
    Abstract: An amorphous form of imipramine pamoate, morphologically pure forms, and mixtures of amorphous and morphologically pure imipramine pamoate characterized by differential scanning calorimetry, fourier transform infrared, and powder x-ray diffraction, and pharmaceutical compositions formed therefrom.
    Type: Grant
    Filed: November 10, 2006
    Date of Patent: May 18, 2010
    Assignee: Pisgah Labs, Inc.
    Inventors: Clifford Riley King, David William Bristol, Vicki Haynes Audia, Joseph Pike Mitchener, Jr.
  • Publication number: 20090259039
    Abstract: Drug substances comprising a pharmaceutically acceptable organic acid addition salt of amine containing pharmaceutically active compounds useful for the treatment of a therapeutic ailment administration and exhibiting prophylactic properties when employed in non-therapeutic administration.
    Type: Application
    Filed: April 3, 2008
    Publication date: October 15, 2009
    Inventors: David William Bristol, Clifford Riley King, Joseph Pike Mitchener, JR., Vicki Haynes Audia
  • Publication number: 20080293695
    Abstract: Drug substances comprising a pharmaceutically acceptable organic acid addition salt 6f amine containing pharmaceutically active compounds useful for the treatment of a therapeutic ailment administration and exhibiting prophylactic properties when employed in non-therapeutic administration.
    Type: Application
    Filed: May 22, 2007
    Publication date: November 27, 2008
    Inventors: David William Bristol, Clifford Riley King, Joseph Pike Mitchener, JR., Vicki Haynes Audia
  • Patent number: 5705648
    Abstract: Mepiquat chloride is formed from the reaction between N-methylpiperidine and chloromethane in an anhydrous liquid solvent selected from the group consisting of acetone, methyl ethyl ketone, toluene, tetrahydrofuran, isopropanol, acetonitrile, N,N-dimethylformamide and methylene chloride in the absence of sodium hydroxide. Mepiquat chloride precipitates as a solid of high purity and is recovered under a substantially moisture-free atmosphere.The solid mepiquat chloride can be sealed into a water soluble pouch or into a water soluble encapsulated solid form (e.g., granule, pellet, or briquette) for convenient handling. The pouch contains powdered mepiquat chloride or the encapsulated solid is merely introduced directly into a spray tank or reservoir for application with low human exposure and no containers in contact with the mepiquat chloride that require disposal.Mepiquat chloride is used as a component of a system for growing a number of commodity plants including cotton.
    Type: Grant
    Filed: October 17, 1994
    Date of Patent: January 6, 1998
    Assignee: Micro Flo Co.
    Inventors: Richard U. Clark, James S. Lovell, James C. Thigpen, David William Bristol, John Raymond Tyndall, Albert Roger Frisbee