Patents by Inventor Rajkumar P. Bhatia

Rajkumar P. Bhatia 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).

  • Double redox system for disinfecting contact lenses
    Patent number: 5591397
    Abstract: An improved method for rapid disinfection of contact lenses in a convenient and reliable manner is disclosed in which a series of oxidation-reduction reactions are employed. Specifically, dichloroisocyanurate and potassium iodide react to form iodine species for disinfecting the contact lens. An amount of ascorbate is then added to neutralize the iodine species.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: January 7, 1997
    Assignee: Alcon Laboratories, Inc.
    Inventors: Ronald L. Schlitzer, N. L. Dassanayake, Rajkumar P. Bhatia
  • Double redox system for disinfecting contact lenses
    Patent number: 5462713
    Abstract: An improved method for rapid disinfection of contact lenses in a convenient and reliable manner is disclosed in which a series of oxidation-reduction reactions are employed. Specifically, dicheoroisocyanurate and potassium iodide react to form iodine species for disinfecting the contact lens. An amount of ascorbate is then added to neutralize the iodine species.
    Type: Grant
    Filed: August 16, 1993
    Date of Patent: October 31, 1995
    Assignee: Alcon Laboratories, Inc.
    Inventors: Ronald L. Schlitzer, N. L. Dassanayake, Rajkumar P. Bhatia
  • Cleaning agent for optical surfaces
    Patent number: 5037484
    Abstract: Soft and hard contact lenses are freed from deposits by rubbing them with a particulate organic polymer with a carrier, the polymer having a particular size in the range from about one micron to about 600 microns and a Rockwell hardness in the range of from about R120 to about M68, or a shore hardness in the range from about A15 to about D100.
    Type: Grant
    Filed: December 5, 1989
    Date of Patent: August 6, 1991
    Assignee: Alcon Laboratories, Inc.
    Inventors: Kai C. Su, Leslie F. Stebbins, Rajkumar P. Bhatia
  • Contact lens cleaning compositions containing an enzyme and a carboxy vinyl polymer
    Patent number: 4921630
    Abstract: Contact lens cleaning compositions containing a combination of an enzyme and a carboxy vinyl polymer, and a method of cleaning contact lenses with such compositions are described. The compositions are capable of cleaning soiled contact lenses very rapidly and completely due to a favorable interaction between the enzyme component and an abrasive precipitate formed by the carboxy vinyl polymer component when a small amount of the compositions is rubbed on the lenses.
    Type: Grant
    Filed: August 4, 1988
    Date of Patent: May 1, 1990
    Assignee: Alcon Laboratories, Inc.
    Inventor: Rajkumar P. Bhatia
  • Contact lens cleaning compositions containing a carboxy vinyl polymer
    Patent number: 4839082
    Abstract: Contact lens cleaning compositions containing a carboxy vinyl polymer, and a method of cleaning contact lenses with such compositions are descrived. The compositions are capable of cleaning soiled contact lenses very rapidly and completely due to the cleaning action of an abrasive precipitate formed by the carboxy vinyl polymer component when a small amount of compositions is rubbed on the lenses.
    Type: Grant
    Filed: August 4, 1988
    Date of Patent: June 13, 1989
    Assignee: Alcon Laboratories, Inc.
    Inventor: Rajkumar P. Bhatia
  • Cleaning agent for optical surfaces
    Patent number: 4792414
    Abstract: Soft and hard contact lenses are freed from deposits by rubbing them with a particulate organic polymer with a carrier, the polymer having a particular size in the range from about one micron to about 600 microns and a Rockwell hardness in the range of from about R30 to about M105, or a shore hardness in the range from about A15 to about D100.
    Type: Grant
    Filed: May 4, 1987
    Date of Patent: December 20, 1988
    Assignee: Alcon Laboratories, Inc.
    Inventors: Kai C. Su, Leslie F. Stebbins, Rajkumar P. Bhatia
  • Cleaning agent for optical surfaces
    Patent number: 4670060
    Abstract: Soft and hard contact lenses are freed from deposits by rubbing them with a particulate organic polymer with a carrier, the polymer having a particular size in the range from about one micron to about 600 microns and a Rockwell hardness in the range of from about R120 to about M68, or a shore hardness in the range from about A15 to about D100.
    Type: Grant
    Filed: May 1, 1986
    Date of Patent: June 2, 1987
    Assignee: Alcon Laboratories, Inc.
    Inventors: Kai C. Su, Leslie F. Stebbins, Rajkumar P. Bhatia
  • Cleaning agent for optical surfaces
    Patent number: 4613379
    Abstract: Soft and hard contact lenses are freed from deposits by rubbing them with a particulate organic polymer with a carrier, the polymer having a particular size in the range from about one micron to about 600 microns and a Rockwell hardness in the range of from about R120 to about M68, or a shore hardness in the range from about A15 to about D100.
    Type: Grant
    Filed: October 19, 1984
    Date of Patent: September 23, 1986
    Assignee: Alcon Laboratories, Inc.
    Inventors: Kai C. Su, Leslie F. Stebbins, Rajkumar P. Bhatia
  • Cleaning agent for optical surfaces
    Patent number: 4493783
    Abstract: Soft and hard contact lenses are freed from deposits by rubbing them with a particulate organic polymer with a carrier, the polymer having a particular size in the range from about one micron to about 600 microns and a Rockwell hardness in the range of from about R120 to about M68, or a shore hardness in the range from about A15 to about D100.
    Type: Grant
    Filed: February 28, 1983
    Date of Patent: January 15, 1985
    Assignee: Alcon Laboratories, Inc.
    Inventors: Kai C. Su, Leslie F. Stebbins, Rajkumar P. Bhatia