Patents by Inventor Masood A. Chowhan

Masood A. Chowhan 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: 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: 20070142458
    Abstract: Topical formulations of olopatadine for treatment of allergic or inflammatory disorders of the nose are disclosed. The aqueous formulations contain approximately 0.6% (w/v) of olopatadine.
    Type: Application
    Filed: February 7, 2007
    Publication date: June 21, 2007
    Inventors: Onkar Singh, G. Wall, Rajni Jani, Masood Chowhan, Wesley Han
  • 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: 20060141059
    Abstract: Self-preserved, multi-dose ophthalmic compositions containing tobramycin are described. The compositions do not contain a conventional antimicrobial preservative, such as benzalkonium chloride. Rather, the compositions are self-preserved as a result of the inherent antimicrobial activity of tobramycin. The compositions preferably also contain either boric acid or, more preferably, a borate/polyol complex selected from the group consisting of borate/propylene glycol, borate/glycerol, and combinations thereof.
    Type: Application
    Filed: December 23, 2005
    Publication date: June 29, 2006
    Inventors: Masood Chowhan, Ernesto Castillo, Glenn Stafford, Rajni Jani, Haresh Bhagat
  • Publication number: 20050074504
    Abstract: Water-soluble borate-polyol complexes are useful as buffers and/or antimicrobials in aqueous ophthalmic compositions, including those containing polyvinyl alcohol. These compositions have greater antimicrobial activity than comparable compositions containing typical borate buffers and unexpectedly increase the antimicrobial efficacy of other antimicrobial agents when used in combination. In addition, use of the borate-polyol complexes avoids the incompatibility problem typically associated with the combination of borate buffer and polyvinyl alcohol; therefore, the compositions disclosed herein may also contain polyvinyl alcohol.
    Type: Application
    Filed: November 23, 2004
    Publication date: April 7, 2005
    Inventors: Masood Chowhan, Nissanke Dassanayake
  • Patent number: 6849253
    Abstract: Water-soluble borate-polyol complexes are useful as buffers and/or antimicrobials in aqueous ophthalmic compositions, including those containing polyvinyl alcohol. These compositions have greater antimicrobial activity than comparable compositions containing typical borate buffers and unexpectedly increase the antimicrobial efficacy of other antimicrobial agents when used in combination. In addition, use of the borate-polyol complexes avoids the incompatibility problem typically associated with the combination of borate buffer and polyvinyl alcohol; therefore, the compositions disclosed herein may also contain polyvinyl alcohol.
    Type: Grant
    Filed: November 22, 2002
    Date of Patent: February 1, 2005
    Assignee: Alcon Manufacturing, Ltd.
    Inventors: Masood Chowhan, Nissanke L. Dassanayake
  • 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
  • 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: 20040028645
    Abstract: An aqueous artificial tear/rewetting drop solution is described. The solution may be utilized as both an artificial tear for persons wearing contact lenses and as a contact lens rewetting drop. The solution is based on the use of a citric acid/sodium citrate buffer system to prevent binding or other complexation between cationic antimicrobial preservatives and soft contact lenses, thereby making it possible to apply the solution directly to contact lenses while the lenses are being worn.
    Type: Application
    Filed: May 5, 2003
    Publication date: February 12, 2004
    Inventor: Masood Chowhan
  • 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: 20030130207
    Abstract: Water-soluble borate-polyol complexes are useful as buffers and/or antimicrobials in aqueous ophthalmic compositions, including those containing polyvinyl alcohol. These compositions have greater antimicrobial activity than comparable compositions containing typical borate buffers and unexpectedly increase the antimicrobial efficacy of other antimicrobial agents when used in combination. In addition, use of the borate-polyol complexes avoids the incompatibility problem typically associated with the combination of borate buffer and polyvinyl alcohol; therefore, the compositions disclosed herein may also contain polyvinyl alcohol.
    Type: Application
    Filed: November 22, 2002
    Publication date: July 10, 2003
    Inventors: Masood Chowhan, Nissanke L. Dassanayake
  • Publication number: 20030040446
    Abstract: An improved, simplified process for cleaning and disinfecting contact lenses is described. The process employs a multi-purpose solution containing a non-oxidative antimicrobial agents, and does not include or require rubbing of the lenses.
    Type: Application
    Filed: August 5, 2002
    Publication date: February 27, 2003
    Inventors: Ralph P. Stone, Masood A. Chowhan, Ruth Ann Rosenthal
  • Patent number: 6503497
    Abstract: Water-soluble borate-polyol complexes are useful as buffers and/or antimicrobials in aqueous ophthalmic compositions, including those containing polyvinyl alcohol. These compositions have greater antimicrobial activity than comparable compositions containing typical borate buffers and unexpectedly increase the antimicrobial efficacy of other antimicrobial agents when used in combination. In addition, use of the boratepolyol complexes avoids the incompatibility problem typically associated with the combination of borate buffer and polyvinyl alcohol; therefore, the compositions disclosed herein may also contain polyvinyl alcohol.
    Type: Grant
    Filed: December 19, 2001
    Date of Patent: January 7, 2003
    Assignee: Alcon Manufacturing, Ltd.
    Inventors: Masood Chowhan, Nissanke L. Dassanayake
  • 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
  • Publication number: 20020098160
    Abstract: Water-soluble borate-polyol complexes are useful as buffers and/or antimicrobials in aqueous ophthalmic compositions, including those containing polyvinyl alcohol. These compositions have greater antimicrobial activity than comparable compositions containing typical borate buffers and unexpectedly increase the antimicrobial efficacy of other antimicrobial agents when used in combination. In addition, use of the borate-polyol complexes avoids the incompatibility problem typically associated with the combination of borate buffer and polyvinyl alcohol; therefore, the compositions disclosed herein may also contain polyvinyl alcohol.
    Type: Application
    Filed: December 19, 2001
    Publication date: July 25, 2002
    Inventors: Masood Chowhan, Nissanke L. Dassanayake
  • Publication number: 20020039975
    Abstract: An improved, simplified process for cleaning and disinfecting contact lenses is described. The process employs a multi-purpose solution containing a non-oxidative antimicrobial agents, and does not include or require rubbing of the lenses.
    Type: Application
    Filed: June 20, 2001
    Publication date: April 4, 2002
    Inventors: Ralph P. Stone, Masood A. Chowhan, Ruth Ann Rosenthal
  • Patent number: 6365636
    Abstract: Water-soluble borate-polyol complexes are useful as buffers and/or antimicrobials in aqueous ophthalmic compositions, including those containing polyvinyl alcohol. These compositions have greater antimicrobial activity than comparable compositions containing typical borate buffers and unexpectedly increase the antimicrobial efficacy of other antimicrobial agents when used in combination. In addition, use of the borate-polyol complexes avoids the incompatibility problem typically associated with the combination of borate buffer and polyvinyl alcohol; therefore, the compositions disclosed herein may also contain polyvinyl alcohol.
    Type: Grant
    Filed: June 20, 2000
    Date of Patent: April 2, 2002
    Assignee: Alcon Manufacturing, Ltd.
    Inventors: Masood Chowhan, Nissanke L. Dassanayake
  • Patent number: 6143799
    Abstract: Water-soluble borate-polyol complexes are useful as buffers and/or antimicrobials in aqueous ophthalmic compositions, including those containing polyvinyl alcohol. These compositions have greater antimicrobial activity than comparable compositions containing typical borate buffers and unexpectedly increase the antimicrobial efficacy of other antimicrobial agents when used in combination. In addition, use of the borate-polyol complexes avoids the incompatibility problem typically associated with the combination of borate buffer and polyvinyl alcohol; therefore, the compositions disclosed herein may also contain polyvinyl alcohol.
    Type: Grant
    Filed: July 2, 1998
    Date of Patent: November 7, 2000
    Assignee: Alcon Laboratories, Inc.
    Inventors: Masood Chowhan, Nissanke L. Dassanayake
  • Patent number: 5948738
    Abstract: Stable liquid enzyme compositions containing an ophthalmically acceptable enzyme and methods involving the combined use of these compositions with a polymeric antimicrobial agent are disclosed for the simultaneous cleaning and disinfecting of contact lens. Methods for a daily use regimen are also disclosed.
    Type: Grant
    Filed: October 6, 1998
    Date of Patent: September 7, 1999
    Assignee: Alcon Laboratories, Inc.
    Inventors: Masood A. Chowhan, Ronald P. Quintana, Bahram Asgharian, Bor-Shyue Hong, Thierry Bilbault, Ruth A. Rosenthal