Patents by Inventor Atul Bhatnagar

Atul Bhatnagar 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).

  • 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
  • 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
  • Melt polymer synthesis of poly ether phosphine oxides
    Patent number: 6040416
    Abstract: A melt polymerization method for producing poly(arylene ethers phosphine oxide)s suited to optical applications comprising reacting a trimethyl silyl derivative of bisphenol and an activated aromatic dihalide, wherein either reactant is a phosphine oxide, is provided.
    Type: Grant
    Filed: February 18, 1999
    Date of Patent: March 21, 2000
    Assignees: Johnson & Johnson Vision Products, Inc., Virginia Tech Intellectual Properties, Inc.
    Inventors: Venkateshwaran N. Sekharipuram, Beverly Sue Mecham, Atul Bhatnagar, James E. McGrath