Patents by Inventor Ernesto J. Castillo

Ernesto J. Castillo 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: 20170216228
    Abstract: The present invention is directed to a pharmaceutical submicron suspension and a method of forming the submicron suspension. The submicron suspension is useful for delivery of relatively hydrophobic and/or low solubility therapeutic agent. The submicron suspension and method of forming the submicron suspension typically employ a polymeric material that aids in preventing aggregation of the therapeutic agent.
    Type: Application
    Filed: April 21, 2017
    Publication date: August 3, 2017
    Inventors: Bahram Asgharian, Ernesto J. Castillo, Masood A. Chowhan
  • Publication number: 20160361254
    Abstract: The present invention is directed to the provision of an ophthalmic composition suitable for intravitreal injection. The composition includes an amount of complexing agent that reacts with one or more endogenous components (e.g., hyaluronic acid) in the eye to form a mass of enhanced viscosity. This mass can aid in creating a desirable release profile of therapeutic agent.
    Type: Application
    Filed: August 24, 2016
    Publication date: December 15, 2016
    Inventors: Masood A. Chowhan, Thomas C. Hohman, Ernesto J. Castillo, Wesley Wehsin Han
  • Patent number: 9446093
    Abstract: The present invention is directed to the provision of an ophthalmic composition suitable for intravitreal injection. The composition includes an amount of complexing agent that reacts with one or more endogenous components (e.g., hyaluronic acid) in the eye to form a mass of enhanced viscosity. This mass can aid in creating a desirable release profile of therapeutic agent.
    Type: Grant
    Filed: October 18, 2013
    Date of Patent: September 20, 2016
    Assignee: Alcon Research, Ltd.
    Inventors: Masood A. Chowhan, Thomas C. Hohman, Ernesto J. Castillo, Wesley Wehsin Han
  • Publication number: 20140294970
    Abstract: The present invention is directed to a pharmaceutical submicron suspension and a method of forming the submicron suspension. The submicron suspension is useful for delivery of relatively hydrophobic and/or low solubility therapeutic agent. The submicron suspension and method of forming the submicron suspension typically employ a polymeric material that aids in preventing aggregation of the therapeutic agent.
    Type: Application
    Filed: June 11, 2014
    Publication date: October 2, 2014
    Inventors: Bahram Asgharian, Ernesto J. Castillo, Masood A. Chowhan
  • Publication number: 20140094419
    Abstract: The present invention is directed to the provision of an ophthalmic composition suitable for intravitreal injection. The composition includes an amount of complexing agent that reacts with one or more endogenous components (e.g., hyaluronic acid) in the eye to form a mass of enhanced viscosity. This mass can aid in creating a desirable release profile of therapeutic agent.
    Type: Application
    Filed: October 18, 2013
    Publication date: April 3, 2014
    Applicant: Alcon Research Ltd.
    Inventors: Masood A. Chowhan, Thomas C. Hohman, Ernesto J. Castillo, Wesley Wehsin Han
  • Patent number: 8431751
    Abstract: New polymeric quaternary ammonium compounds with vicinal hydroxyl groups are disclosed. These compounds are useful as disinfectants in contact lens care compositions and/or as preservatives in ophthalmic compositions. Compositions containing these compounds are also disclosed. These compositions are especially useful for disinfecting/cleaning contact lenses.
    Type: Grant
    Filed: December 22, 2009
    Date of Patent: April 30, 2013
    Assignee: Alcon Research, Ltd.
    Inventors: Ernesto J. Castillo, Hwang-Hsing Chen, Masood A. Chowhan, Glenn D. Stafford, Jr.
  • Publication number: 20120053161
    Abstract: Solution formulations containing a corticosteroid, cyclodextrin, and xanthan gum are disclosed. The formulations are intended for topical application to the eye, ear, or nose.
    Type: Application
    Filed: July 28, 2009
    Publication date: March 1, 2012
    Applicant: Novartis AG
    Inventors: Ernesto J. Castillo, Huixiang Zhang, Glenn D. Stafford, Wesley Wehsin Han
  • Publication number: 20110071091
    Abstract: The present invention is directed to the provision of an ophthalmic composition suitable for intravitreal injection. The composition includes an amount of complexing agent that reacts with one or more endogenous components (e.g., hyaluronic acid) in the eye to form a mass of enhanced viscosity. This mass can aid in creating a desirable release profile of therapeutic agent.
    Type: Application
    Filed: September 21, 2010
    Publication date: March 24, 2011
    Inventors: Masood A. Chowhan, Thomas C. Hohman, Ernesto J. Castillo, Wesley Wehsin Han
  • Publication number: 20100076045
    Abstract: The present invention is directed to a pharmaceutical submicron suspension and a method of forming the submicron suspension. The submicron suspension is useful for delivery of relatively hydrophobic and/or low solubility therapeutic agent. The submicron suspension and method of forming the submicron suspension typically employ a polymeric material that aids in preventing aggregation of the therapeutic agent.
    Type: Application
    Filed: September 16, 2009
    Publication date: March 25, 2010
    Inventors: Ernesto J. Castillo, Bahram Asgharian, Masood A. Chowhan
  • Publication number: 20090215735
    Abstract: Solution formulations containing a corticosteroid, cyclodextrin, and xanthan gum are disclosed. The formulations are intended for topical application to the eye, ear, or nose.
    Type: Application
    Filed: May 8, 2009
    Publication date: August 27, 2009
    Applicant: Alcon, Inc.
    Inventors: Ernesto J. Castillo, Huixiang Zhang, Glenn D. Stafford, JR., Wisley Wehsin Han
  • Patent number: 7402609
    Abstract: Topical formulations of olopatadine for treatment of allergic or inflammatory disorders of the eye and nose are disclosed. The aqueous formulations contain approximately 0.17-0.62% (w/v) of olopatadine and an amount of polyvinylpyrrolidone or polystyrene sulfonic acid sufficient to enhance the physical stability of the formulations.
    Type: Grant
    Filed: March 15, 2005
    Date of Patent: July 22, 2008
    Assignee: Alcon, Inc.
    Inventors: Ernesto J. Castillo, Wesley Wehsin Han, Huixiang Zhang, Haresh G. Bhagat, Onkar N. Singh, Joseph Paul Bullock, Suresh C. Dixit
  • Patent number: 7001615
    Abstract: Sustained release suspension formulations for ophthalmic, otic and nasal administration are disclosed. The formulations comprise a basic active, a cation exchange resin, and a combination of a polymeric suspending agents to provide superior resuspendability.
    Type: Grant
    Filed: November 15, 2002
    Date of Patent: February 21, 2006
    Assignee: Alcon, Inc.
    Inventors: Onkar N. Singh, Ernesto J. Castillo
  • Patent number: 6995186
    Abstract: Topical formulations of olopatadine for treatment of allergic or inflammatory disorders of the eye and nose are disclosed. The aqueous formulations contain approximately 0.17-0.62% (w/v) of olopatadine and an amount of polyvinylpyrrolidone or polystyrene sulfonic acid sufficient to enhance the physical stability of the formulations.
    Type: Grant
    Filed: June 19, 2002
    Date of Patent: February 7, 2006
    Assignee: Alcon, Inc.
    Inventors: Ernesto J. Castillo, Wesley Wehsin Han, Huixiang Zhang, Haresh G. Bhagat, Onkar N. Singh, Joseph Paul Bullock, Suresh C. Dixit
  • Publication number: 20040132704
    Abstract: Topical ophthalmic compositions and methods for treating dry eye are described. The compositions and methods of the invention are based on the finding that the oculosurface selective properties of the glucocorticoid rimexolone make this anti-inflammatory agent particularly well-suited for treating dry eye. As a result of the limited ability of rimexolone to penetrate the cornea, a high portion of the drug remains on the surface of the eye, which is the primary locus of the inflammatory conditions associated with dry eye. This enables a very low concentration of drug to be utilized, which in turn reduces the potential for elevations of intraocular pressure and cataract formation.
    Type: Application
    Filed: December 18, 2003
    Publication date: July 8, 2004
    Inventors: John M. Yanni, Daniel A. Gamache, Steven T. Miller, Ernesto J. Castillo
  • Patent number: 6743439
    Abstract: Aqueous pharmaceutical solution compositions preserved with a cationic preservative and comprising a cationic drug and a sulfonated styrene/maleic anhydride copolymer are disclosed. The compositions are particularly well suited for topical ophthalmic use, but may also be used as topically administrable otic or nasal compositions.
    Type: Grant
    Filed: June 5, 2002
    Date of Patent: June 1, 2004
    Assignee: Alcon, Inc.
    Inventors: Ernesto J. Castillo, Wesley Wehsin Han, Huixiang Zhang, Ronald F. Berry
  • Publication number: 20030055102
    Abstract: Topical formulations of olopatadine for treatment of allergic or inflammatory disorders of the eye and nose are disclosed. The aqueous formulations contain approximately 0.17-0.62% (w/v) of olopatadine and an amount of polyvinylpyrrolidone or polystyrene sulfonic acid sufficient to enhance the physical stability of the formulations.
    Type: Application
    Filed: June 19, 2002
    Publication date: March 20, 2003
    Applicant: Alcon, Inc.
    Inventors: Ernesto J. Castillo, Wesley Wehsin Han, Huixiang Zhang, Haresh G. Bhagat, Onkar N. Singh, Joseph Paul Bullock, Suresh C. Dixit
  • Patent number: 6486208
    Abstract: This invention relates to reduced stinging, sustained release ophthalmic formulations and the method of treatment comprising administering such formulations topically to the eye when in need thereof.
    Type: Grant
    Filed: March 15, 2001
    Date of Patent: November 26, 2002
    Assignee: Alcon Laboratories, Inc.
    Inventors: Ernesto J. Castillo, Ruma Sarkar, Onkar N. Singh, Alan L. Weiner, Cody Yarborough
  • Patent number: 6444710
    Abstract: Fatty acid/amino acid soaps are used to enhance antimicrobial effectiveness in topically administrable pharmaceutical compositions containing at least one active ingredient, a cationic preservative and an anionic polyelectrolyte, such as a carboxyvinyl polymer, xanthan gum, polystyrene sulfonic acid polymer or cationic exchange resin.
    Type: Grant
    Filed: September 7, 2001
    Date of Patent: September 3, 2002
    Assignee: Alcon Manufacturing, Ltd.
    Inventors: Ernesto J. Castillo, Steven Gerson, Wesley Wehsin Han
  • Publication number: 20020035154
    Abstract: Fatty acid/amino acid soaps are used to enhance antimicrobial effectiveness in topically administrable pharmaceutical compositions containing at least one active ingredient, a cationic preservative and an anionic polyelectrolyte, such as a carboxyvinyl polymer, xanthan gum, polystyrene sulfonic acid polymer or cationic exchange resin.
    Type: Application
    Filed: September 7, 2001
    Publication date: March 21, 2002
    Inventors: Ernesto J. Castillo, Steven Gerson, Wesley Wehsin Han
  • Patent number: 6284749
    Abstract: Fatty acid/amino acid soaps are used in conjunction with an antifungal acid and a chelating agent as a new preservative system for topically administrable pharmaceutical compositions.
    Type: Grant
    Filed: September 21, 1999
    Date of Patent: September 4, 2001
    Assignee: Alcon Manufacturing, Ltd.
    Inventors: Ernesto J. Castillo, Steven Howard Gerson, Wesley Wehsin Han