Patents by Inventor Shivkumar Mahadevan

Shivkumar Mahadevan 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).

  • Process for making ophthalmic lenses
    Patent number: 8414804
    Abstract: The present invention relates to aqueous processes for the production of silicone hydrogel contact lenses.
    Type: Grant
    Filed: March 23, 2006
    Date of Patent: April 9, 2013
    Assignee: Johnson & Johnson Vision Care, Inc.
    Inventors: Azaam Alli, Diana Zanini, James D. Ford, Shivkumar Mahadevan, Kristy Canavan, David C. Turner
  • Process for the production of bis(trimethylsilyloxy)silylalkylglycerol methacrylates
    Patent number: 8373000
    Abstract: The present invention relates to a process comprising the steps of reacting a substituted epoxide, and preferably a silicone containing substituted epoxide with at least one lithium acrylic acid salt, at least one acrylic acid and optionally at least one inhibitor at a temperature above about 60° C. to form a substituted hydroxy acrylate.
    Type: Grant
    Filed: June 4, 2004
    Date of Patent: February 12, 2013
    Assignee: Johnson & Johnson Vision Care, Inc.
    Inventors: Frank Molock, Jason Garner, Shivkumar Mahadevan
  • MEDICAL DEVICES HAVING HOMOGENEOUS CHARGE DENSITY AND METHODS FOR MAKING SAME
    Publication number: 20120283353
    Abstract: The present invention relates to ionic silicone hydrogel polymers displaying improved lysozyme uptake, low contact angle and reduced water soluble polymeric ammonium salt uptake.
    Type: Application
    Filed: April 18, 2012
    Publication date: November 8, 2012
    Inventors: Shivkumar Mahadevan, Zohra Fadli, Charles Scales, Thomas Maggio, Kunisi Venkatasubban, Eric R. George, James D. Ford, Carrie L. Davis, Leah Hansen, Scott L. Joslin
  • SYNTHESIS OF HYDROXYALKYL AMIDES FROM ESTERS
    Publication number: 20120277444
    Abstract: Hydroxyamides are synthesized from esters. A process of making hydroxyalkyl amides comprises: reacting an ester with a hydroxyalkyl amine having the formula H2N—R3—OH wherein R3 is a substituted or unsubstituted C2 to C5 alkyl, in the presence of a catalyst in an anhydrous solution to form the hydroxyalkyl amides. Monomers suitable for formation of polymeric articles can utilize these hydroxyamides.
    Type: Application
    Filed: March 8, 2012
    Publication date: November 1, 2012
    Inventors: Shivkumar Mahadevan, Kunisi Venkatasubban
  • Wettable hydrogels comprising acyclic polyamides
    Patent number: 8222353
    Abstract: The present invention relates to biomedical devices, and particularly contact lenses comprising a polymer having entangled therein at least one acyclic polyamide.
    Type: Grant
    Filed: August 10, 2011
    Date of Patent: July 17, 2012
    Assignee: Johnson & Johnson Vision Care, Inc.
    Inventors: Osman Rathore, Shivkumar Mahadevan, Frank Molock, Azaam Alli, David Turner, Douglas G. Vanderlaan, Kevin P. McCabe
  • Silicone hydrogels having consistent concentrations of multi-functional polysiloxanes
    Patent number: 8097565
    Abstract: The present invention relates to a process comprising forming a monomer mixture comprising at least one monofunctional silicone containing component which comprises at least one difunctional byproduct and adding to said monomer mixture a normalizing amount of said at least one difunctional byproduct and curing said monomer mixture to form a biomedical device.
    Type: Grant
    Filed: June 4, 2004
    Date of Patent: January 17, 2012
    Assignee: Johnson & Johnson Vision Care, Inc.
    Inventors: Gregory A. Hill, John C. Heaton, Michael R. Clark, Shivkumar Mahadevan, Carrie L Caison, Frank F. Molock
  • WETTABLE HYDROGELS COMPRISING ACYCLIC POLYAMIDES
    Publication number: 20110294914
    Abstract: The present invention relates to biomedical devices, and particularly contact lenses comprising a polymer having entangled therein at least one acyclic polyamide.
    Type: Application
    Filed: August 10, 2011
    Publication date: December 1, 2011
    Inventors: Osman Rathore, Shivkumar Mahadevan, Frank Molock, Azaam Alli, David Turner, Douglas G. Vanderlaan, Kevin P. McCabe
  • NON-REACTIVE, HYDROPHILIC POLYMERS HAVING TERMINAL SILOXANES AND METHODS FOR MAKING AND USING THE SAME
    Publication number: 20110275734
    Abstract: The present invention relates to compositions comprising at least one stable, near-monodisperse, non-reactive hydrophilic polymer comprising in said polymer's backbone, a hydrophilic segment having a degree of polymerization of about 10 to about 1000, and a linear silicone segment at least one terminal end of said non-reactive hydrophilic polymer, wherein said silicone segment comprises between about 6 and about 200 siloxy units, and said non-reactive hydrophilic polymer is associated, via the linear silicone block with a silicone hydrogel. The non-reactive hydrophilic polymers may be incorporated into the formulation from which the silicone hydrogel is made or may be contacted with the silicone hydrogel post formation.
    Type: Application
    Filed: May 4, 2011
    Publication date: November 10, 2011
    Inventors: Charles SCALES, Kunisi Venkatasubban, Shivkumar Mahadevan, Zohra Fadli, Carrie Davis, Brent Matthew Healy
  • Wettable hydrogels comprising acyclic polyamides
    Patent number: 8022158
    Abstract: The present invention relates to biomedical devices, and particularly contact lenses comprising a polymer having entangled therein at least one acyclic polyamide.
    Type: Grant
    Filed: February 23, 2010
    Date of Patent: September 20, 2011
    Assignee: Johnson & Johnson Vision Care, Inc.
    Inventors: Osman Rathore, Shivkumar Mahadevan, Frank Molock, Azaam Alli, David Turner, Douglas G. Vanderlaan, Kevin P. McCabe
  • Methods for Providing Oxidatively Stable Ophthalmic Compositions
    Publication number: 20110201596
    Abstract: This invention relates to a process for improving the stability of an ophthalmically compatible solution comprising at least one oxidatively unstable ophthalmic compound.
    Type: Application
    Filed: April 27, 2011
    Publication date: August 18, 2011
    Inventors: Azaam Alli, Shivkumar Mahadevan
  • LASER ENHANCED LENS
    Publication number: 20110181835
    Abstract: This invention discloses methods and apparatus for modifying a silicone contact lens via laser ablation and a resulting modified lens. In some embodiments a lens is ablated in a hydrated state. A lens may also be ablated in an environment of decreased oxygen content.
    Type: Application
    Filed: January 20, 2011
    Publication date: July 28, 2011
    Inventors: Thomas R. Rooney, Michael F. Widman, Shivkumar Mahadevan
  • METHODS AND DEVICES TO TEST DIFFUSION RATES OF OCULAR DRUG DELIVERY SYSTEMS
    Publication number: 20110139995
    Abstract: Methods of detecting the discharge and uptake rates of ophthalmic lenses containing pharmaceutical agents are disclosed herein.
    Type: Application
    Filed: February 24, 2011
    Publication date: June 16, 2011
    Inventors: Stephen C. Pegram, Shivkumar Mahadevan
  • Methods and devices to test diffusion rates of ocular drug delivery systems
    Patent number: 7918125
    Abstract: Methods of detecting the discharge and uptake rates of ophthalmic lenses containing pharmaceutical agents are disclosed herein.
    Type: Grant
    Filed: October 31, 2007
    Date of Patent: April 5, 2011
    Assignee: Johnson & Johnson Vision Care, Inc.
    Inventors: Stephen C. Pegram, Shivkumar Mahadevan
  • Laser enhanced lens
    Patent number: 7901075
    Abstract: This invention discloses methods and apparatus for modifying a silicone contact lens via laser ablation and a resulting modified lens. In some embodiments a lens is ablated in a hydrated state. A lens may also be ablated in an environment of decreased oxygen content.
    Type: Grant
    Filed: December 22, 2008
    Date of Patent: March 8, 2011
    Assignee: Johnson & Johnson Vision Care, Inc.
    Inventors: Thomas R. Rooney, Michael F. Widman, Shivkumar Mahadevan
  • Method for coating articles by mold transfer
    Patent number: 7879267
    Abstract: A method for coating hydrogel and silicone hydrogel articles, and articles made by the method, are provided in which the coating is first applied to the molding surface in which an article-forming material will be cured to form the article. The method permits the thickness and uniformity of the coating to be more easily controlled than in known coating methods.
    Type: Grant
    Filed: August 2, 2001
    Date of Patent: February 1, 2011
    Assignee: J&J Vision Care, Inc.
    Inventors: David C. Turner, Lenora C. Copper, Dominic Gourd, Shivkumar Mahadevan, Frank F. Molock, Kevin P. McCabe, Dharmesh K. Dubey, Jeffery S. Longo, Jonathan P. Adams, Andrew J Wagner, Xiaoping Lin
  • Wettable hydrogels comprising acyclic polyamides
    Patent number: 7786185
    Abstract: The present invention relates to biomedical devices, and particularly contact lenses comprising a polymer having entangled therein at least one acyclic polyamide.
    Type: Grant
    Filed: February 14, 2005
    Date of Patent: August 31, 2010
    Assignee: Johnson & Johnson Vision Care, Inc.
    Inventors: Osman Rathore, Shivkumar Mahadevan, Frank Molock, Azaam Alli, David Turner, Douglas G. Vanderlaan, Kevin P. McCabe
  • WETTABLE HYDROGELS COMPRISING ACYCLIC POLYAMIDES
    Publication number: 20100151123
    Abstract: The present invention relates to biomedical devices, and particularly contact lenses comprising a polymer having entangled therein at least one acyclic polyamide.
    Type: Application
    Filed: February 23, 2010
    Publication date: June 17, 2010
    Inventors: Osman Rathore, Shivkumar Mahadevan, Frank Molock, Azaam Alli, David Turner, Douglas G. Vanderlaan, Kevin P. McCabe
  • METHODS AND OPHTHALMIC DEVICES USED IN THE TREATMENT OF OCULAR ALLERGIES
    Publication number: 20090324691
    Abstract: Ophthalmic devices containing anti-allergic agents and methods of preparing the same are disclosed herein.
    Type: Application
    Filed: June 11, 2009
    Publication date: December 31, 2009
    Inventors: Shivkumar Mahadevan, Edgar V. Menezes
  • OPHTHALMIC SOLUTIONS DISPLAYING IMPROVED EFFICACY
    Publication number: 20090239775
    Abstract: The present invention relates to ophthalmic compositions comprising a pH between about 6 and about 8 and about 50 to about 1000 ppm hydrogen peroxide, about 100 ppm to about 2000 ppm of at least one chlorite compound and about 20 to 100 ppm of at least one saturated, polymeric quaternium salt. The ophthalmic compositions of the present invention display improved antifungal efficacy against fusarium solani.
    Type: Application
    Filed: March 6, 2009
    Publication date: September 24, 2009
    Inventors: Gary L. Collins, Frank F. Molock, JR., Shivkumar Mahadevan
  • LASER ENHANCED LENS
    Publication number: 20090168014
    Abstract: This invention discloses methods and apparatus for modifying a silicone contact lens via laser ablation and a resulting modified lens. In some embodiments a lens is ablated in a hydrated state. A lens may also be ablated in an environment of decreased oxygen content.
    Type: Application
    Filed: December 22, 2008
    Publication date: July 2, 2009
    Inventors: Thomas R. Rooney, Michael F. Widman, Shivkumar Mahadevan