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: 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: 20090197838
    Abstract: The present invention relates to a formulation comprising a N-halogenated amino acid and a phase transfer agent. The present invention also describes a method for disinfecting and/or cleaning a contact lens comprising contacting a contact lens with a formulation comprising a N-halogenated amino acid salt for a time sufficient to disinfect and/or clean the lens.
    Type: Application
    Filed: April 30, 2008
    Publication date: August 6, 2009
    Applicant: ALCON RESEARCH, LTD.
    Inventors: L. Wayne Schneider, Wesley Wehsin Han, Masood A. Chowhan, David W. Stroman, W. Dennis Dean, Michael S. Gaines
  • Publication number: 20080287395
    Abstract: The use of certain synthetic phospholipids to preserve pharmaceutical compositions from microbial contamination is described. The synthetic phospholipids have unique molecular arrangements wherein a phosphate group is linked to a quaternary ammonium functionality via a substituted-propenyl group, and the quaternary ammonium functionality is further linked to at least one long hydrocarbon chain. Such molecular arrangements are what make the phospholipids of formula (I) highly water soluble, e.g., the length of the hydrocarbon chain assists to maintain solubility and efficacy of the molecules for the uses described herein. The synthetic phospholipids described herein have been found to be particularly useful as antimicrobial preservatives for ophthalmic, otic and nasal pharmaceutical compositions, especially ophthalmic compositions. These compounds may also be utilized to disinfect contact lenses.
    Type: Application
    Filed: May 16, 2008
    Publication date: November 20, 2008
    Applicant: ALCON RESEARCH, LTD.
    Inventors: Malay Ghosh, Masood A. Chowhan, L. Wayne Schneider
  • Publication number: 20080275126
    Abstract: The present invention relates to methods for treating an infected tissue comprising treating the infected tissue with a formulation comprising a N-halogenated amino acid and an aliphatic acid. This specification also discloses methods for improving the antimicrobial activity of a formulation comprising a N-halogenated amino acid, the method comprising adding an aliphatic acid to said formulation.
    Type: Application
    Filed: April 30, 2008
    Publication date: November 6, 2008
    Applicant: ALCON RESEARCH, LTD.
    Inventors: Masood A. Chowhan, Wesley Wehsin Han, Wayne L. Schneider, David W. Stroman
  • Publication number: 20080275122
    Abstract: The present invention relates to a formulation having antimicrobial activity comprising a N-halogenated amino acid and a anti-inflammatory compound. This specification also describes methods for treating a tissue infection comprising contacting the infected tissue with a pharmaceutically effective amount of a formulation comprising a N-halogenated amino acid and a anti-inflammatory compound. This specification further describes a method for treating respiratory infections comprising contacting the site of the respiratory infection with a pharmaceutically effective amount of a formulation comprising a N-halogenated amino acid and a anti-inflammatory compound.
    Type: Application
    Filed: April 30, 2008
    Publication date: November 6, 2008
    Applicant: ALCON RESEARCH, LTD.
    Inventors: Masood A. Chowhan, Wesley Wehsin Han
  • Publication number: 20080275123
    Abstract: The present invention relates to a method for treating a tissue infection comprising contacting the infected tissue with a pharmaceutically effective amount of a formulation comprising a N-halogenated amino acid and a phase transfer agent. This specification also describes a formulation having antimicrobial activity comprising a N-halogenated amino acid and a phase transfer agent.
    Type: Application
    Filed: April 30, 2008
    Publication date: November 6, 2008
    Applicant: ALCON RESEARCH, LTD.
    Inventors: Masood A. Chowhan, Nissanke L. Dassanayake, Wesley Wehsin Han, Wayne L. Schneider, David W. Stroman
  • Publication number: 20080275121
    Abstract: The present invention relates to methods for disinfecting or cleaning a contact lens comprising contacting a contact lens with a formulation comprising a N-halogenated amino acid and a phase transfer agent for a time sufficient to disinfect or clean the lens. This specification further discloses a formulation for disinfecting a contact lens comprising an N-halogenated amino acid and a phase transfer agent.
    Type: Application
    Filed: April 30, 2008
    Publication date: November 6, 2008
    Applicant: ALCON RESEARCH, LTD.
    Inventors: Masood A. Chowhan, Wesley Wehsin Han, L. Wayne Schneider, David W. Stroman, Nissanke L. Dassanayake
  • 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: 20080145406
    Abstract: Disclosed are ophthalmic drug-delivery devices, comprising a body having a proximal end and a distal end, wherein the body includes a styrene elastomer matrix and a drug in contact with the matrix. Also disclosed are methods of treating or preventing an eye disease in a subject, that involve contacting an eye of the subject with an ophthalmic drug delivery device comprising a body having a proximal end and a distal end, wherein the body comprises a styrene elastomer matrix and a drug in contact with the matrix, wherein release of the drug from the device occurs over time following contacting of the device with the eye of the subject.
    Type: Application
    Filed: November 8, 2007
    Publication date: June 19, 2008
    Applicant: Alcon Manufacturing Ltd.
    Inventors: Bahram Asgharian, Masood A. Chowhan
  • Publication number: 20080114076
    Abstract: Disclosed is a pharmaceutical composition comprising a water insoluble polymer matrix that comprises a bioerodable polyester polymer or a fatty acid based polyester polymer, or a mixture of both polymers, wherein the polymer matrix has a melting point of less than 60° C., and wherein the composition is liquid or paste at room temperature and is formulated to occlude a punctual channel in a subject and conforms to the shape of the canalicular or punctal channel.
    Type: Application
    Filed: November 8, 2007
    Publication date: May 15, 2008
    Applicant: Alcon Manufacturing Ltd.
    Inventors: Bahram Asgharian, Masood A. Chowhan
  • Publication number: 20080113027
    Abstract: Disclosed is a pharmaceutical composition comprising (a) a bioerodible water insoluble polymer matrix comprising a polyester polymer, wherein the polymer matrix has a melting point of less than 60° C. and (b) an active agent dispersed within the polymer matrix, wherein the composition is formulated to controllably release the active agent for a pre-determined period of time to a target site. Also disclosed are methods of treating a disease or condition with the disclosed compositions.
    Type: Application
    Filed: November 8, 2007
    Publication date: May 15, 2008
    Applicant: Alcon Manufacturing Ltd.
    Inventors: Bahram Asgharian, Masood A. Chowhan, Martin B. Wax
  • Publication number: 20080093247
    Abstract: Packaging materials substantially lacking adsorptive and absorptive properties for 2-pyrrolidone derivatives are provided. The packaged products described herein provide for retention of the 2-pyrrolidone derivative within the formulation thereby maintaining the integrity of such formulations. Packaged products are useful for ophthalmic, otic, and nasal applications. Ophthalmic application includes therapeutic uses and contact lens care uses.
    Type: Application
    Filed: October 24, 2007
    Publication date: April 24, 2008
    Applicant: Alcon Manufacturing Ltd.
    Inventors: Wesley Wehsin Han, Masood A. Chowhan, Jang-Shing Chiou, L. Wayne Schneider, Bhagwati P. Kabra
  • Publication number: 20080089953
    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 12, 2007
    Publication date: April 17, 2008
    Applicant: ALCON, INC.
    Inventors: Masood Chowhan, Ernesto Castillo, Glenn Stafford, Rajni Jani, Haresh Bhagat
  • 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
  • Publication number: 20080075790
    Abstract: The present invention is directed to the provision of multi-dose, self-preserved ophthalmic compositions. The compositions possess sufficient antimicrobial activity to satisfy USP preservative efficacy requirements, as well as similar preservative standards (e.g., EP and JP), without requiring the presence of conventional anti-microbial preservative agents, such as benzalkonium chloride. The compositions are effectively preserved by a balanced ionic buffer system containing zinc ions at a concentration of 0.04 to 0.9 mM, preferably 0.04 to 0.4 mM. One aspect of the balanced buffer system is limitation of the amount of buffering anions present to a concentration of 15 mM or less, preferably 5 mM or less. In a preferred embodiment, the compositions also contain borate or, most preferably, one or more borate/polyol complexes. The use of propylene glycol as the polyol in such complexes is strongly preferred.
    Type: Application
    Filed: September 20, 2007
    Publication date: March 27, 2008
    Applicant: ALCON MANUFACTURING, LTD.
    Inventors: Bhagwati Kabra, Masood Chowhan, L. Schneider, Wesley Han
  • 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: 20070244442
    Abstract: An ophthalmic drug delivery device having two actuation assemblies for dispensing incompatible dosage forms and facilitating the prevention of dosage form reflux.
    Type: Application
    Filed: May 16, 2007
    Publication date: October 18, 2007
    Inventor: Masood Chowhan
  • 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