Patents by Inventor Venkat Sekharipuram

Venkat Sekharipuram 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).

  • Stabilized ultra-violet absorbers
    Patent number: 7887882
    Abstract: The invention provides UV absorber solutions that do not require use of a solvent to prevent formation of insoluble reaction products. The invention is useful in the manufacture of ocular devices including spectacle, contact and intraocular lenses, but may find its greatest utility in the manufacture of spectacle lenses.
    Type: Grant
    Filed: February 9, 2005
    Date of Patent: February 15, 2011
    Assignee: Essilor International (Compagnie Generale d'Optique)
    Inventors: Ivan M. Nunez, Venkat Sekharipuram, Scott J. Carlesco, Michele L. Alron
  • High refractive index thermoplastic polyphosphonates
    Patent number: 7375178
    Abstract: High refractive index, melt processable polyphosphonates and methods for preparing the same are provided. These polymers are particularly useful for optical and ophthalmic parts, such as lenses. A method of preparing optical and ophthalmic lenses by injection molding the polymers of the present invention into the form of the optical or ophthalmic lenses is also provided.
    Type: Grant
    Filed: June 27, 2006
    Date of Patent: May 20, 2008
    Assignee: Essilor International
    Inventors: Hosadurga K. Shobha, Venkat Sekharipuram, James E. McGrath, Atul Bhatnagar
  • High refractive index thermoplastic polyphosphonates
    Publication number: 20070155951
    Abstract: High refractive index, melt processable polyphosphonates and methods for preparing the same are provided. These polymers are particularly useful for optical and ophthalmic parts, such as lenses. A method of preparing optical and ophthalmic lenses by injection molding the polymers of the present invention into the form of the optical or ophthalmic lenses is also provided.
    Type: Application
    Filed: June 27, 2006
    Publication date: July 5, 2007
    Inventors: Hosadurga Shobha, Venkat Sekharipuram, James McGrath, Atul Bhatnagar
  • Stabilized ultra-violet absorbers
    Publication number: 20060175579
    Abstract: The invention provides UV absorber solutions that do not require use of a solvent to prevent formation of insoluble reaction products. The invention is useful in the manufacture of ocular devices including spectacle, contact and intraocular lenses, but may find its greatest utility in the manufacture of spectacle lenses.
    Type: Application
    Filed: February 9, 2005
    Publication date: August 10, 2006
    Inventors: Ivan Nunez, Venkat Sekharipuram, Scott Carlesco, Michele Alron
  • High refractive index thermoplastic polyphosphonates
    Patent number: 7067083
    Abstract: High refractive index, melt processable polyphosphonates and methods for preparing the same are provided. These polymers are particularly useful for optical and ophthalmic parts, such as lenses. A method of preparing optical and ophthalmic lenses by injection molding the polymers of the present invention into the form of the optical or ophthalmic lenses is also provided.
    Type: Grant
    Filed: April 13, 2005
    Date of Patent: June 27, 2006
    Assignees: Essilor International (Compagnie Generale D'Optique), Virginia Tech Intellectual Properties, Inc.
    Inventors: Venkat Sekharipuram, Hosadurga K. Shobha, James E. McGrath, Atul Bhatnagar
  • High refractive index thermoplastic polyphosphonates
    Patent number: 6943221
    Abstract: High refractive index, melt processable polyphosphonates and methods for preparing the same are provided. These polymers are particularly useful for optical and ophthalmic parts, such as lenses. A method of preparing optical and ophthalmic lenses by injection molding the polymers of the present invention into the form of the optical or ophthalmic lenses is also provided.
    Type: Grant
    Filed: August 18, 2003
    Date of Patent: September 13, 2005
    Assignee: Johnson & Johnson Vision Care, Inc.
    Inventors: Hosadurga K. Shobha, Venkat Sekharipuram, James E. McGrath, Atul Bhatnagar
  • High refractive index thermoplastic polyphosphonates
    Publication number: 20050179860
    Abstract: High refractive index, melt processable polyphosphonates and methods for preparing the same are provided. These polymers are particularly useful for optical and ophthalmic parts, such as lenses. A method of preparing optical and ophthalmic lenses by injection molding the polymers of the present invention into the form of the optical or ophthalmic lenses is also provided.
    Type: Application
    Filed: April 13, 2005
    Publication date: August 18, 2005
    Applicants: Johnson & Johnson Vision Care, Inc., Virginia Tech Intellectual Properties, Inc.
    Inventors: Venkat Sekharipuram, Hosadurga Shobha, James McGrath, Atul Bhatnagar
  • HIGH REFRACTIVE INDEX THERMOPLASTIC POLYPHOSPHONATES
    Publication number: 20050101755
    Abstract: High refractive index, melt processable polyphosphonates and methods for preparing the same are provided. These polymers are particularly useful for optical and ophthalmic parts, such as lenses. A method of preparing optical and ophthalmic lenses by injection molding the polymers of the present invention into the form of the optical or ophthalmic lenses is also provided.
    Type: Application
    Filed: August 18, 2003
    Publication date: May 12, 2005
    Inventors: Hosadurga Shobha, Venkat Sekharipuram, James McGrath, Atul Bhatnagar
  • High refractive index thermoplastic polyphosphonates
    Patent number: 6653439
    Abstract: High refractive index, melt processable polyphosphonates and methods for preparing the same are provided. These polymers are particularly useful for optical and ophthalmic parts, such as lenses. A method of preparing optical and ophthalmic lenses by injection molding the polymers of the present invention into the form of the optical or ophthalmic lenses is also provided.
    Type: Grant
    Filed: June 22, 2001
    Date of Patent: November 25, 2003
    Assignees: Johnson & Johnson Vision Care, Inc., Virginia Tech Intellectual Properties Inc.
    Inventors: Hosadurga K. Shobha, Venkat Sekharipuram, James E. McGrath, Atul Bhatnagar
  • Methods and compositions for the manufacture of ophthalmic lenses
    Patent number: 6630083
    Abstract: The present invention provides methods and compositions for producing lenses by casting. The processes utilize a two-stage, ultraviolet cure to provide a fast and reliable method for producing ophthalmic lenses.
    Type: Grant
    Filed: December 21, 1999
    Date of Patent: October 7, 2003
    Assignee: Johnson & Johnson Vision Care, Inc.
    Inventors: Ivan Nunez, Venkat Sekharipuram, Elbert Basham, Eric Dogan, Michele Alton
  • Compositions and methods for the manufacture of ophthalmic lenses
    Patent number: 6455653
    Abstract: The invention provides compositions for producing lenses by casting. The compositions are useful in producing ophthalmic lens by casting of a surface or layer onto a preform.
    Type: Grant
    Filed: May 8, 2000
    Date of Patent: September 24, 2002
    Assignee: Johnson & Johnson Vision Care, Inc.
    Inventors: Ivan Nunez, Venkat Sekharipuram, Michele Alton
  • Apparatus for automated ophthalmic lens fabrication
    Patent number: 6439870
    Abstract: An apparatus for the automated production of ophthalmic lenses, particularly compound lenses having a plastic coating on a plastic lens is described. A mold, after rotational orientation, is placed in a gimbal assembly to provide for the proper tilt. This gimbal assembly forms part of a fixture attached to an indexing means which moves for complete assembly of a molding fixture and then moves the molding fixture through a chamber to cure the resin. A preform, after rotational orientation, is held, by a preform gripper placed above the mold, and with sufficient clearance between the mold and the preform to allow the correct resin thickness during the curing portion of the process. The fixture is also provided with members to firmly grip the preform gripper so as to maintain its orientation throughout the curing process.
    Type: Grant
    Filed: May 26, 2000
    Date of Patent: August 27, 2002
    Assignee: Johnson & Johnson Vision Care, Inc.
    Inventors: Gary Marceau, Dan Boulay, Ivan Nunez, Charles Foster, Eric Dogan, Joseph A. Bishop, Amitava Gupta, Steven Hamblin, Edgar Menezes, Venkat Sekharipuram, Ron Kok, Michael Hompus, Jack van Nunen, Marc Evers, Edwin van Doorn
  • High refractive index thermoplastic polyphosphonates
    Publication number: 20020058779
    Abstract: High refractive index, melt processable polyphosphonates and methods for preparing the same are provided. These polymers are particularly useful for optical and ophthalmic parts, such as lenses. A method of preparing optical and ophthalmic lenses by injection molding the polymers of the present invention into the form of the optical or ophthalmic lenses is also provided.
    Type: Application
    Filed: June 22, 2001
    Publication date: May 16, 2002
    Applicant: Johnson & Johnson Vision Products, Inc., and Virginia Tech Intellectual Properties, Inc.
    Inventors: Hosadurga K. Shobha, Venkat Sekharipuram, James E. McGrath, Atul Bhatnagar
  • High refractive index thermoplastic polyphosphonates
    Patent number: 6288210
    Abstract: High refractive index, melt processable polyphosphonates and methods for preparing the same are provided. These polymers are particularly useful for optical and ophthalmic parts, such as lenses. A method of preparing optical and ophthalmic lenses by injection molding the polymers of the present invention into the form of the optical or ophthalmic lenses is also provided.
    Type: Grant
    Filed: November 12, 1999
    Date of Patent: September 11, 2001
    Assignees: Virginia Tech. Intellectual Properties, Inc., Johnson & Johnson Vision Products, Inc.
    Inventors: Hosadurga K. Shobha, Venkat Sekharipuram, James E. McGrath, Atul Bhatnagar