Patents by Inventor Nathaniel D. McQueen

Nathaniel D. McQueen 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: 10584307
    Abstract: The use of poly(oxyethylene)-poly(oxybutylene) block copolymers in pharmaceutical compositions useful for modifying the surfaces of contact lenses and other medical devices is disclosed. The present invention is based in-part on a discovery that this class of compounds is particularly efficient in wetting hydrophobic surfaces, such as the surfaces of silicone hydrogel contact lenses and other types of ophthalmic lenses. Such compounds are also useful for cleaning purposes. The use of the compounds as surfactants in various types of compositions for treating contact lenses therefore represents a preferred embodiment of the present invention.
    Type: Grant
    Filed: January 5, 2017
    Date of Patent: March 10, 2020
    Assignee: Alcon Inc.
    Inventors: Howard Allen Ketelson, Nathaniel D. McQueen
  • Publication number: 20170114300
    Abstract: The use of poly(oxyethylene)-poly(oxybutylene) block copolymers in pharmaceutical compositions useful for modifying the surfaces of contact lenses and other medical devices is disclosed. The present invention is based in-part on a discovery that this class of compounds is particularly efficient in wetting hydrophobic surfaces, such as the surfaces of silicone hydrogel contact lenses and other types of ophthalmic lenses. Such compounds are also useful for cleaning purposes. The use of the compounds as surfactants in various types of compositions for treating contact lenses therefore represents a preferred embodiment of the present invention.
    Type: Application
    Filed: January 5, 2017
    Publication date: April 27, 2017
    Inventors: Howard Allen Ketelson, Nathaniel D. McQueen
  • Patent number: 9574160
    Abstract: The use of poly(oxyethylene)-poly(oxybutylene) block copolymers in pharmaceutical compositions useful for modifying the surfaces of contact lenses and other medical devices is disclosed. The present invention is based in-part on a discovery that this class of compounds is particularly efficient in wetting hydrophobic surfaces, such as the surfaces of silicone hydrogel contact lenses and other types of ophthalmic lenses. Such compounds are also useful for cleaning purposes. The use of the compounds as surfactants in various types of compositions for treating contact lenses therefore represents a preferred embodiment of the present invention.
    Type: Grant
    Filed: November 16, 2010
    Date of Patent: February 21, 2017
    Assignee: ALCON RESEARCH, LTD.
    Inventors: Howard Allen Ketelson, Nathaniel D. McQueen
  • Patent number: 8318144
    Abstract: The use of poly(oxyethylene)-poly(oxybutylene) block copolymers in pharmaceutical compositions useful for modifying the surfaces of contact lenses and other medical devices is disclosed. The present invention is based in-part on a discovery that this class of compounds is particularly efficient in wetting hydrophobic surfaces, such as the surfaces of silicone hydrogel contact lenses and other types of ophthalmic lenses. Such compounds are also useful for cleaning purposes. The use of the compounds as surfactants in various types of compositions for treating contact lenses therefore represents a preferred embodiment of the present invention.
    Type: Grant
    Filed: December 10, 2007
    Date of Patent: November 27, 2012
    Assignee: Alcon Research, Ltd.
    Inventors: Howard Allen Ketelson, Nathaniel D. McQueen
  • Publication number: 20110059039
    Abstract: The use of poly(oxyethylene)-poly(oxybutylene) block copolymers in pharmaceutical compositions useful for modifying the surfaces of contact lenses and other medical devices is disclosed. The present invention is based in-part on a discovery that this class of compounds is particularly efficient in wetting hydrophobic surfaces, such as the surfaces of silicone hydrogel contact lenses and other types of ophthalmic lenses. Such compounds are also useful for cleaning purposes. The use of the compounds as surfactants in various types of compositions for treating contact lenses therefore represents a preferred embodiment of the present invention.
    Type: Application
    Filed: November 16, 2010
    Publication date: March 10, 2011
    Applicant: ALCON RESEARCH, LTD.
    Inventors: Howard Allen Ketelson, Nathaniel D. McQueen
  • Publication number: 20080138310
    Abstract: The use of poly(oxyethylene)-poly(oxybutylene) block copolymers in pharmaceutical compositions useful for modifying the surfaces of contact lenses and other medical devices is disclosed. The present invention is based in-part on a discovery that this class of compounds is particularly efficient in wetting hydrophobic surfaces, such as the surfaces of silicone hydrogel contact lenses and other types of ophthalmic lenses. Such compounds are also useful for cleaning purposes. The use of the compounds as surfactants in various types of compositions for treating contact lenses therefore represents a preferred embodiment of the present invention.
    Type: Application
    Filed: December 10, 2007
    Publication date: June 12, 2008
    Applicant: ALCON MANUFACTURING, LTD.
    Inventors: Howard Allen Ketelson, Nathaniel D. McQueen
  • Patent number: 7344725
    Abstract: The use of inorganic nanoparticles to stabilize aqueous hydrogen peroxide solutions is described. The preferred nanoparticles are formed from clays. The use of nanoparticles formed from synthetic smectite clays is particularly preferred. The stabilized hydrogen peroxide solutions may be utilized for various purposes, but are particularly useful as contact lens disinfecting solutions.
    Type: Grant
    Filed: November 16, 2004
    Date of Patent: March 18, 2008
    Assignee: Alcon, Inc.
    Inventors: Howard Allen Ketelson, Nathaniel D. McQueen
  • Patent number: 6936640
    Abstract: Biguanide/quaternary ammonium compounds and the use of same as antimicrobial agents in pharmaceutical compositions are described. The biguanide/quaternary ammonium compounds are useful in the preservation of pharmaceutical compositions, particularly ophthalmic pharmaceutical compositions and compositions for treating contact lenses. The compounds are especially useful for disinfecting contact lenses.
    Type: Grant
    Filed: November 18, 2004
    Date of Patent: August 30, 2005
    Assignee: Alcon, Inc.
    Inventors: Nathaniel D. McQueen, Joonsup Park
  • Patent number: 6916958
    Abstract: Aminobiguanides and the use of same as antimicrobial agents in pharmaceutical compositions are disclosed. The aminobiguanides are useful in the preservation of pharmaceutical compositions, particularly ophthalmic pharmaceutical compositions and compositions for treating contact lenses. The compounds are especially useful for disinfecting contact lenses.
    Type: Grant
    Filed: September 26, 2003
    Date of Patent: July 12, 2005
    Assignee: Alcon Manufacturing, Ltd.
    Inventors: Joonsup Park, Nissanke L. Dassanayake, Nathaniel D. McQueen, Ronald L. Schlitzer
  • Publication number: 20040063791
    Abstract: Aminobiguanides and the use of same as antimicrobial agents in pharmaceutical compositions are disclosed. The aminobiguanides are useful in the preservation of pharmaceutical compositions, particularly ophthalmic pharmaceutical compositions and compositions for treating contact lenses. The compounds are especially useful for disinfecting contact lenses.
    Type: Application
    Filed: September 26, 2003
    Publication date: April 1, 2004
    Inventors: Joonsup Park, Nissanke L. Dassanayake, Nathaniel D. McQueen, Ronald L. Schlitzer
  • Patent number: 6664294
    Abstract: Aminobiguanides and the use of same as antimicrobial agents in pharmaceutical compositions are disclosed. The aminobiguanides are useful in the preservation of pharmaceutical compositions, particularly ophthalmic pharmaceutical compositions and compositions for treating contact lenses. The compounds are especially useful for disinfecting contact lenses.
    Type: Grant
    Filed: August 3, 2000
    Date of Patent: December 16, 2003
    Assignee: Alcon Manufacturing, Ltd.
    Inventors: Joonsup Park, Nissanke L. Dassanayake, Nathaniel D. McQueen, Ronald L. Schlitzer
  • Patent number: 6423748
    Abstract: Amido polybiguanides and their use as antimicrobial agents in pharmaceutical compositions are disclosed. A method of synthesis of amido polybiguanides is also disclosed. The amido polybiguanides are useful in the preservation of pharmaceutical compositions, particulary opthalmic and otic pharmaceutical compositions and compositions for treating contact lenses. The compounds are especially useful for disinfecting contact lenses.
    Type: Grant
    Filed: September 19, 2000
    Date of Patent: July 23, 2002
    Assignee: Alcon Manufacturing, Ltd.
    Inventors: Joonsup Park, Nathaniel D. McQueen
  • Patent number: 6316669
    Abstract: Bis-amido polybiguanides and their use as antimicrobial agents in pharmaceutical compositions are disclosed. A method of synthesis of bis-amido polybiguanides is also disclosed. The bis-amido polybiguanides are useful in the preservation of pharmaceutical compositions, particularly ophthalmic and otic pharmaceutical compositions and compositions for treating contact lenses. The compounds are especially useful for disinfecting/cleaning contact lenses.
    Type: Grant
    Filed: September 19, 2000
    Date of Patent: November 13, 2001
    Assignee: Alcon Manufacturing, Ltd.
    Inventors: Joonsup Park, Nathaniel D. McQueen