Patents by Inventor Rajkumar Bhatia

Rajkumar 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).

  • Method of cleaning contact lenses using carbon dioxide and carbonic acid
    Patent number: 6273960
    Abstract: Methods for cleaning soiled contact lenses are disclosed. The methods involve contacting the soiled lens with a cleaning composition comprising carbon dioxide and carbonic acid as cleansing agents. The cleaning compositions do not require abrasive agents such as polymeric beads, nor ocularly irritating agents such as enzymes or surfactants in order to effectively clean proteinaceous and nonproteinaceous deposits from the surface of contact lenses.
    Type: Grant
    Filed: September 12, 2000
    Date of Patent: August 14, 2001
    Assignee: Alcon Manufacturing Ltd.
    Inventors: Rajkumar Bhatia, Alok K. Kulshreshtha, Geoffrey R. Owen, Yusuf Ali
  • Use of carbon dioxide and carbonic acid to clean contact lenses
    Patent number: 6171404
    Abstract: Simple, efficacious, easily manufacturable, convenient to use and cost-effective contact lens care cleaning compositions comprising carbon dioxide and carbonic acid as cleansing agents are disclosed. The compositions do not require abrasive agents such as polymeric beads, nor ocularly irritating agents such as enzymes or surfactants in order to effectively clean proteinaceous and nonproteinaceous deposits from the surface of contact lenses. Also disclosed is a one-step cleaning and disinfecting regimen, whereby an effervescent tablet composition capable of generating carbon dioxide and carbonic acid is dissolved in a disinfecting solution or rinsing/disinfecting/storage solution.
    Type: Grant
    Filed: April 22, 1999
    Date of Patent: January 9, 2001
    Assignee: Alcon Laboratories, Inc.
    Inventors: Rajkumar Bhatia, Alok K. Kulshreshtha, Geoffrey R. Owen, Yusuf Ali
  • Use of carbon dioxide and carbonic acid to clean contact lenses
    Patent number: 5909745
    Abstract: Simple, efficacious, easily manufacturable, convenient to use and cost-effective contact lens care cleaning compositions comprising carbon dioxide and carbonic acid as cleansing agents are disclosed. The compositions do not require abrasive agents such as polymeric beads, nor ocularly irritating agents such as enzymes or surfactants in order to effectively clean proteinaceous and nonproteinaceous deposits from the surface of contact lenses. Also disclosed is a one-step cleaning and disinfecting regimen, whereby an effervescent tablet composition capable of generating carbon dioxide and carbonic acid is dissolved in a disinfecting solution or rinsing/disinfecting/storage solution.
    Type: Grant
    Filed: June 18, 1998
    Date of Patent: June 8, 1999
    Assignee: Alcon Laboratories, Inc.
    Inventors: Yusuf Ali, Rajkumar Bhatia, Alok K. Kulshreshtha