Patents by Inventor Huagang Chen

Huagang Chen 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: 20160095927
    Abstract: Ophthalmic compositions suitable for use as artificial tears or as vehicles for ophthalmic drugs are disclosed. The compositions contain a combination of two polymers that have a synergistic effect on viscosity.
    Type: Application
    Filed: October 3, 2014
    Publication date: April 7, 2016
    Applicant: NOVARTIS AG
    Inventors: Masood A. Chowhan, Huagang Chen
  • Patent number: 8313754
    Abstract: Ophthalmic compositions suitable for use as artificial tears or as vehicles for ophthalmic drugs are disclosed. The compositions contain a combination of two polymers that have a synergistic effect on viscosity.
    Type: Grant
    Filed: April 11, 2011
    Date of Patent: November 20, 2012
    Assignee: Novartis AG
    Inventors: Masood A. Chowhan, Huagang Chen
  • Publication number: 20110190203
    Abstract: Ophthalmic compositions suitable for use as artificial tears or as vehicles for ophthalmic drugs are disclosed. The compositions contain a combination of two polymers that have a synergistic effect on viscosity.
    Type: Application
    Filed: April 11, 2011
    Publication date: August 4, 2011
    Applicant: Alcon, Inc.
    Inventors: Masood A. Chowhan, Huagang Chen
  • Patent number: 7947295
    Abstract: Ophthalmic compositions suitable for use as artificial tears or as vehicles for ophthalmic drugs are disclosed. The compositions contain a combination of two polymers that have a synergistic effect on viscosity.
    Type: Grant
    Filed: February 9, 2007
    Date of Patent: May 24, 2011
    Assignee: Alcon, Inc.
    Inventors: Masood A. Chowhan, Huagang Chen
  • Patent number: 7914803
    Abstract: Ophthalmic compositions suitable for use as artificial tears or as vehicles for ophthalmic drugs are disclosed. The compositions contain a combination of three polymers that have a synergistic effect on viscosity.
    Type: Grant
    Filed: February 9, 2007
    Date of Patent: March 29, 2011
    Assignee: Alcon, Inc.
    Inventors: Masood A. Chowhan, Huagang Chen
  • Patent number: 7709012
    Abstract: Ophthalmic compositions suitable for use as artificial tears or as vehicles for ophthalmic drugs are disclosed. The compositions contain a combination of two polymers that have a synergistic effect on viscosity.
    Type: Grant
    Filed: June 8, 2004
    Date of Patent: May 4, 2010
    Assignee: Alcon, Inc.
    Inventors: Masood A. Chowhan, Huagang Chen
  • Patent number: 7618620
    Abstract: Ophthalmic compositions suitable for use as artificial tears or as vehicles for ophthalmic drugs are disclosed. The compositions contain a combination of three polymers that have a synergistic effect on viscosity.
    Type: Grant
    Filed: October 18, 2007
    Date of Patent: November 17, 2009
    Assignee: Alcon, Inc.
    Inventors: Masood A. Chowhan, Huagang Chen
  • Publication number: 20080193407
    Abstract: Ophthalmic compositions suitable for use as artificial tears or as vehicles for ophthalmic drugs are disclosed. The compositions contain a combination of three polymers that have a synergistic effect on viscosity.
    Type: Application
    Filed: February 8, 2008
    Publication date: August 14, 2008
    Applicant: ALCON, INC.
    Inventors: Masood A. Chowhan, Huagang Chen
  • Publication number: 20080075687
    Abstract: Ophthalmic compositions suitable for use as artificial tears or as vehicles for ophthalmic drugs are disclosed. The compositions contain a combination of three polymers that have a synergistic effect on viscosity.
    Type: Application
    Filed: October 18, 2007
    Publication date: March 27, 2008
    Applicant: Alcon, Inc.
    Inventors: Masood Chowhan, Huagang Chen
  • Patent number: 7329411
    Abstract: Ophthalmic compositions suitable for use as artificial tears or as vehicles for ophthalmic drugs are disclosed. The compositions contain a combination of three polymers that have a synergistic effect on viscosity.
    Type: Grant
    Filed: June 4, 2007
    Date of Patent: February 12, 2008
    Assignee: Alcon, Inc.
    Inventors: Masood A. Chowhan, Huagang Chen
  • Patent number: 7306802
    Abstract: Ophthalmic compositions suitable for use as artificial tears or as vehicles for ophthalmic drugs are disclosed. The compositions contain a combination of three polymers that have a synergistic effect on viscosity.
    Type: Grant
    Filed: June 4, 2007
    Date of Patent: December 11, 2007
    Assignee: Alcon, Inc.
    Inventors: Masood A. Chowhan, Huagang Chen
  • Publication number: 20070231294
    Abstract: Ophthalmic compositions suitable for use as artificial tears or as vehicles for ophthalmic drugs are disclosed. The compositions contain a combination of three polymers that have a synergistic effect on viscosity.
    Type: Application
    Filed: June 4, 2007
    Publication date: October 4, 2007
    Applicant: ALCON, INC.
    Inventors: Masood Chowhan, Huagang Chen
  • Publication number: 20070224159
    Abstract: Ophthalmic compositions suitable for use as artificial tears or as vehicles for ophthalmic drugs are disclosed. The compositions contain a combination of three polymers that have a synergistic effect on viscosity.
    Type: Application
    Filed: June 4, 2007
    Publication date: September 27, 2007
    Applicant: ALCON, INC.
    Inventors: Masood Chowhan, Huagang Chen
  • Patent number: 7244440
    Abstract: Ophthalmic compositions suitable for use as artificial tears or as vehicles for ophthalmic drugs are disclosed. The compositions contain a combination of three polymers that have a synergistic effect on viscosity.
    Type: Grant
    Filed: June 8, 2004
    Date of Patent: July 17, 2007
    Assignee: Alcon, Inc.
    Inventors: Masood A. Chowhan, Huagang Chen
  • Publication number: 20070128288
    Abstract: Ophthalmic compositions suitable for use as artificial tears or as vehicles for ophthalmic drugs are disclosed. The compositions contain a combination of three polymers that have a synergistic effect on viscosity.
    Type: Application
    Filed: February 9, 2007
    Publication date: June 7, 2007
    Applicant: ALCON, INC.
    Inventors: Masood Chowhan, Huagang Chen
  • Publication number: 20070128156
    Abstract: Ophthalmic compositions suitable for use as artificial tears or as vehicles for ophthalmic drugs are disclosed. The compositions contain a combination of two polymers that have a synergistic effect on viscosity.
    Type: Application
    Filed: February 9, 2007
    Publication date: June 7, 2007
    Applicant: ALCON, INC.
    Inventors: Masood Chowhan, Huagang Chen
  • Publication number: 20040253280
    Abstract: Ophthalmic compositions suitable for use as artificial tears or as vehicles for ophthalmic drugs are disclosed. The compositions contain a combination of two polymers that have a synergistic effect on viscosity.
    Type: Application
    Filed: June 8, 2004
    Publication date: December 16, 2004
    Applicant: Alcon, Inc.
    Inventors: Masood A. Chowhan, Huagang Chen
  • Publication number: 20040253202
    Abstract: Ophthalmic compositions suitable for use as artificial tears or as vehicles for ophthalmic drugs are disclosed. The compositions contain a combination of three polymers that have a synergistic effect on viscosity.
    Type: Application
    Filed: June 8, 2004
    Publication date: December 16, 2004
    Applicant: Alcon, Inc.
    Inventors: Masood A. Chowhan, Huagang Chen
  • Patent number: 6620797
    Abstract: Improved artificial tear compositions are described. The compositions are preferably formulated as sterile, isotonic solutions. The solutions contain a unique combination of three demulcents. The solutions preferably also contain one or more electrolytes and may also contain a nonionic surfactant. The solutions provide ocular comfort and are particularly useful in patients that are experiencing mild to moderate dryness or other irritation of the cornea. The solutions may be packaged as either an unpreserved unit dose product or as a preserved multi-dose product. The multi-dose products contain a very mild antimicrobial preservative system, and consequently can be frequently applied to the eye with little risk of ocular irritation attributable to the preservative components.
    Type: Grant
    Filed: December 13, 2001
    Date of Patent: September 16, 2003
    Assignee: Alcon, Inc.
    Inventors: Masood A. Chowhan, Huagang Chen
  • Publication number: 20020123482
    Abstract: Improved artificial tear compositions are described. The compositions are preferably formulated as sterile, isotonic solutions. The solutions contain a unique combination of three demulcents. The solutions preferably also contain one or more electrolytes and may also contain a nonionic surfactant. The solutions provide ocular comfort and are particularly useful in patients that are experiencing mild to moderate dryness or other irritation of the cornea. The solutions may be packaged as either an unpreserved unit dose product or as a preserved multi-dose product. The multi-dose products contain a very mild antimicrobial preservative system, and consequently can be frequently applied to the eye with little risk of ocular irritation attributable to the preservative components.
    Type: Application
    Filed: December 13, 2001
    Publication date: September 5, 2002
    Inventors: Masood A. Chowhan, Huagang Chen