Patents by Inventor Erning Xia

Erning Xia 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: 20120283333
    Abstract: Ophthalmic compositions that comprise 0.5 ppm to 15 ppm ?-[4-tris(2-hydroxyethyl)-ammonium chloride-2-butenyl]poly[1-dimethyl ammonium chloride-2-butenyl]-?-tris(2-hydroxyethyl) ammonium chloride; 0.005 wt. % to 0.05 wt. % hyaluronic acid; citrate, citric acid or a mixture thereof; and 0.01 wt. % to 0.8 wt. % of an amphoteric surfactant of general formula I wherein R1 is R or —(CH2)n-NHC(O)R, wherein R is a C8-C30alkyl optionally substituted with hydroxyl and n is 2, 3 or 4; R2 and R3 are each independently selected from the group consisting of hydrogen and C1-C4alkyl; R4 is a C2-C8alkylene optionally substituted with hydroxyl; and Y is CO2? or SO3?. The invention is also direct to the use of the ophthalmic compositions to clean and disinfect contact lenses, and in particular, soft, silicone hydrogel contact lenses.
    Type: Application
    Filed: July 20, 2012
    Publication date: November 8, 2012
    Inventors: Erning Xia, Susan E. Burke, Srini Venkatesh, Vicki L. Barniak
  • Publication number: 20120196840
    Abstract: Compositions for treating, reducing, ameliorating, or preventing infections comprise a fluoroquinolone having Formulae I-VIII and an additional anti-infective agent. Methods for treating, reducing, ameliorating, or preventing such infection use such compositions. Such compositions and methods can be effective against mixed types of pathogens including certain antibiotic-resistant microbial pathogens found in such infections.
    Type: Application
    Filed: April 3, 2012
    Publication date: August 2, 2012
    Inventors: Praveen Tyle, Erning Xia, Hongna Wang, Susan E. Norton, Pramod Kumar Gupta, Keith W. Ward, Lynne Brunner
  • Publication number: 20120122815
    Abstract: The present invention is directed to a composition for treating dry eye comprising, in one embodiment, carboxymethylcellulose and a polyol. Such compositions have been found to alleviate the symptoms of dry eye and remain in the eye for a long period of time.
    Type: Application
    Filed: January 11, 2012
    Publication date: May 17, 2012
    Inventors: Erning Xia, Joseph C. Salamone, X. Michael Liu
  • Patent number: 8173640
    Abstract: Compositions for treating, reducing, ameliorating, or preventing infections comprise a fluoroquinolone having Formulae I-VIII and an additional anti-infective agent. Methods for treating, reducing, ameliorating, or preventing such infection use such compositions. Such compositions and methods can be effective against mixed types of pathogens including certain antibiotic-resistant microbial pathogens found in such infections.
    Type: Grant
    Filed: May 6, 2008
    Date of Patent: May 8, 2012
    Assignee: Bausch & Lomb Incorporated
    Inventors: Praveen Tyle, Erning Xia, Honga Wang, Susan E. Norton, Pramod Kumar Gupta, Keith W. Ward, Lynne Brunner
  • Patent number: 8138156
    Abstract: Ophthalmic composition comprising one or more polyglycines selected from the group consisting of diglycine, triglycine, tetraglycine and pentaglycine, or the salts of each thereof and one or more boron buffering compounds. The ophthalmic composition will have an osmolality of from 200 mOsmol/kg to 420 mOsmol/kg.
    Type: Grant
    Filed: October 17, 2007
    Date of Patent: March 20, 2012
    Assignee: Bausch & Lomb Incorporated
    Inventors: Susan E. Burke, Erning Xia, Catherine Scheuer, Srini Venkastesh
  • Patent number: 8119112
    Abstract: Ophthalmic compositions that comprise 0.1 ppm to 10 ppm of a cationic antimicrobial component selected from the group consisting of biguanides, polymeric biguanides, quaternium ammonium compounds and any one mixture thereof; 0.005 wt. % to 0.15 wt. % of hyaluronic acid; and 0.01 wt. % to 1.0 wt. % of an amphoteric surfactant of general formula I wherein R1 is R or —(CH2)n—NHC(O)R, wherein R is a C8-C16alkyl optionally substituted with hydroxyl and n is 2, 3 or 4; R2 and R3 are each independently selected from methyl, ethyl, propyl or iso-propyl; and R4 is a C2-C8alkylene optionally substituted with hydroxyl. The invention is also direct to the use of the ophthalmic compositions to clean and disinfect contact lenses, and in particular, soft, silicone hydrogel contact lenses.
    Type: Grant
    Filed: September 3, 2008
    Date of Patent: February 21, 2012
    Assignee: Bausch & Lomb Incorporated
    Inventors: Erning Xia, Susan E. Burke, Srini Venkatesh, Vicki Barniak
  • Patent number: 8114420
    Abstract: The present invention is directed to a composition for treating dry eye comprising, in one embodiment, carboxymethylcellulose and a polyol. Such compositions have been found to alleviate the symptoms of dry eye and remain in the eye for a long period of time.
    Type: Grant
    Filed: March 28, 2006
    Date of Patent: February 14, 2012
    Assignee: Bausch & Lomb Incorporated
    Inventors: Erning Xia, Joseph Salamone, X. Michael Liu
  • Publication number: 20120028947
    Abstract: An aqueous ophthalmic composition comprising loteprednol etabonate, and polyacryclic acid. The composition has a viscosity in the range from about 300 cp to about 1500 cp, and a total concentration of cations of less than about 50 mM. The ophthalmic composition is used to treat patients suffering from allergic conjunctivitis, and includes instructing a person suffering from ocular itching resulting from allergic conjunctivitis to administer once or twice daily in the form of one or more eye drops the aqueous ophthalmic composition described.
    Type: Application
    Filed: September 22, 2011
    Publication date: February 2, 2012
    Inventors: Erning Xia, John Denick, JR., Judith K. Denick, Richard V. Smerbeck, Martin J. Coffey
  • Publication number: 20110311646
    Abstract: A contact lens disinfecting solution that comprises 0.5 wt. % to 6 wt. % hydrogen peroxide, or a chemical precursor of hydrogen peroxide, and a P-metal modulating compound. The presence of the P-metal modulating compound in the disinfecting hydrogen peroxide solution slows the rate at which the hydrogen peroxide is neutralized, particularly during the initial two hours, by a catalyst element that includes a P-metal. This reduction in rate of peroxide neutralization provides a more effective solution for killing certain microorganisms and fungi.
    Type: Application
    Filed: January 24, 2011
    Publication date: December 22, 2011
    Inventors: Kimberly Anne Millard, Erning Xia, Suzanne F. Groemminger, Jenilee Kilbury
  • Publication number: 20110301250
    Abstract: The present invention is directed to a composition for treating dry eye comprising, in one embodiment, carboxymethylcellulose and a polyol. Such compositions have been found to alleviate the symptoms of dry eye and remain in the eye for a long period of time.
    Type: Application
    Filed: August 22, 2011
    Publication date: December 8, 2011
    Inventors: Erning Xia, Joseph Salamone, X. Michael Liu
  • Publication number: 20110251147
    Abstract: Compositions for treating or controlling infections comprise a fluoroquinolone having Formulae I-VIII and have a pH in the range from about 3.5 to about 5.5 or from about 10.5 to about 12. Methods for treating or controlling such infection use such compositions. Such compositions and methods can deliver a higher amount of the fluoroquinolone to the affected site.
    Type: Application
    Filed: June 24, 2011
    Publication date: October 13, 2011
    Inventors: Srini Venkatesh, Hongna Wang, Erning Xia, Matthew S. Jonasse
  • Publication number: 20110195927
    Abstract: Compositions comprise a polymer having units of an amino sugar, a polyol other than sorbitol, and boric acid, a salt thereof, or a combination thereof. Such compositions remain for an extended period in the eye and can be used for relief, treatment, or control of a condition of dry eye or discomfort resulting therefrom.
    Type: Application
    Filed: September 10, 2009
    Publication date: August 11, 2011
    Inventors: Erning Xia, Craig M. Cody, Tammy J. Kleiber, Susan E. Burke
  • Publication number: 20110142786
    Abstract: A contact lens care solution that includes a functionalized hydroxypropyl alkylglucoside. The functionalized hydroxypropyl alkylglucoside is typically in the form a mixture of various alkylglycosides because: (1) the functional reagents can react with any one or more of the many hydroxyl groups on the glycoside; and (2) the glycosides are present as a mixture of glycosides with a degree of polymerization from 1 to about 4. The solution will also include a buffer system to maintain the pH of the composition from 7.2 to 8.5. In particular, the solution can be formulated to clean and disinfect contact lenses or the solution is formulated as a rewet eye drop for use with contact lenses.
    Type: Application
    Filed: February 24, 2011
    Publication date: June 16, 2011
    Inventors: Erning Xia, Kimberly Millard
  • Publication number: 20100286010
    Abstract: An aqueous solution for cleaning and disinfecting a contact lens comprising 0.5 ppm to 5 ppm of 1,1?-hexamethylene-bis[5-(2-ethylhexyl)biguanide; 0.5 ppm to 3 ppm ?-[4-tris(2-hydroxyethyl)-ammonium chloride-2-butenyl]poly[1-dimethyl ammonium chloride-2-butenyl]-?-tris(2-hydroxyethyl)ammonium chloride; 0.005 wt. % to 0.04 wt. % hyaluronic acid; a boric acid/borate buffer; and a nonionic surfactant selected from poloxamer, poloxamine or any combination thereof.
    Type: Application
    Filed: July 21, 2010
    Publication date: November 11, 2010
    Inventors: Erning Xia, Susan E. Burke, Srini Venkatesh, Vicki Barniak
  • Publication number: 20100234336
    Abstract: An aqueous ophthalmic composition comprises a carboxy-containing polyanionic polymer that has a viscosity in the range from about 300 cp to about 1500 cp outside the eye and a total concentration of cations of less than about 50 mM, wherein the viscosity of the composition does not increase when the composition comes into contact with surface ocular fluid.
    Type: Application
    Filed: March 26, 2010
    Publication date: September 16, 2010
    Inventors: Erning Xia, John Denick, JR., Richard V. Smerbeck, Martin J. Coffey
  • Publication number: 20100075919
    Abstract: A pharmaceutical formulation for topical, ophthalmic or nasal administration comprising one or more alkyldimonium hydroxypropyl alkylglucosides of general formula I or general formula II and a pharmaceutical active, wherein R is a straight or branched C8-C24alkyl; A is —CH2CH(OH)CH2N+(CH3)2R1X?, wherein R1 is a C8-C24alkyl and X? is a common counteranion, n is an average value from 1 to 6 and m is an average value from 1 to 2
    Type: Application
    Filed: September 22, 2008
    Publication date: March 25, 2010
    Inventors: Erning Xia, Kimberly Millard
  • Patent number: 7659259
    Abstract: The present invention includes a method of treating inflammation of the eye comprising administering to an eye of a patient suffering from inflammation of the eye, a composition comprising an aqueous solution of alginate having a minimum of about 50% mannuronate residues based upon the total number of saccharide monomeric units.
    Type: Grant
    Filed: December 13, 2007
    Date of Patent: February 9, 2010
    Assignee: Bausch & Lomb Incorporated
    Inventors: Erning Xia, Dharmendra M. Jani
  • Patent number: 7632869
    Abstract: The use of compositions containing one or more ether amine antimicrobial agents and/or ether amine derivative antimicrobial agents in an amount effective to disinfect and/or preserve medical devices is described. Solutions containing one or more ether amine antimicrobial agent- and/or ether amine derivative antimicrobial agent-containing compositions and methods of making and using the same are also described.
    Type: Grant
    Filed: May 24, 2004
    Date of Patent: December 15, 2009
    Assignee: Bausch & Lomb Incorporated
    Inventors: Erning Xia, Alyce K. Dobie, John Denick
  • Patent number: 7632794
    Abstract: A contact lens care solution comprising one or more alkyldimonium hydroxypropyl alkylglucosides of general formula I or general formula II wherein R is a straight or branched C8-C24alkyl; A is —CH2CH(OH)CH2N+(CH3)2R1X?, wherein R1 is a C8-C24alkyl and X? is a common counteranion, n is an average value from 1 to 6 and m is an average value from 1 to 2. The solution is formulated to clean and disinfect contact lenses or the solution is formulated as a rewet eye drop for use with contact lenses.
    Type: Grant
    Filed: September 22, 2008
    Date of Patent: December 15, 2009
    Assignee: Bausch & Lomb Incorporated
    Inventors: Erning Xia, Kimberly Millard, Srini Venkatesh
  • Publication number: 20090304811
    Abstract: A pharmaceutical formulation that is effective in adversely affecting the viability of microorganisms or in inhibiting their growth and that provides better safety and/or comfort to the users comprises a polysaccharide, a source of hydrogen peroxide, and an anti-oxidant. The formulation can further comprise a chelating agent and/or an ophthalmically active agent for treating or controlling a disease or disorder of the eye. The formulation may be used to treat, clean, disinfect, store, wet, or rewet contact lenses.
    Type: Application
    Filed: May 19, 2009
    Publication date: December 10, 2009
    Inventors: Erning Xia, Michael E. Allen, Steven K. MacLeod, Tammy J. Kleiber, Graig M. Cody