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).

  • Publication number: 20060226401
    Abstract: Various non-limiting embodiments of the present disclosure relate to ophthalmic devices comprising photochromic materials comprising a reactive substituent. For example, the present disclosure contemplates ophthalmic devices comprising photochromic materials, such as photochromic naphthopyrans and indeno-fused naphthopyrans having a reactive substituent comprising a reactive moiety linked to the photochromic naphthopyran by one or more linking groups. In certain non-limiting embodiments, the reactive moiety comprises a polymerizable moiety. In other non-limiting embodiments, the reactive moiety comprises a nucleophilic moiety. Other non-limiting embodiments of the present disclosure relate to methods of making the photochromic ophthalmic device, wherein the photochromic ophthalmic devices comprise the photochromic naphthopyrans described herein.
    Type: Application
    Filed: April 8, 2005
    Publication date: October 12, 2006
    Inventors: Wenjing Xiao, Barry Van Gemert, Shivkumar Mahadevan, Frank Molock
  • Publication number: 20060110427
    Abstract: The present invention relates to ophthalmic solutions and devices comprising at least one water soluble polymer having a molecular weight of at least about 500,000 Daltons and comprising linear or branched polyether pendant groups having a molecular weight of at least about 300.
    Type: Application
    Filed: November 22, 2004
    Publication date: May 25, 2006
    Inventors: Frank Molock, Kathrine Lorenz, Shivkumar Mahadevan
  • Publication number: 20060100408
    Abstract: The present invention relates to a process comprising (a) dosing a reactive mixture comprising at least one crosslinkable prepolymer into a mold; (b) curing said reactive mixture to form a medical device; (c) contacting, said medical device with no more than about 500 mL of solution per medical device; and (d) incorporating, prior to or during said contacting step (c), at least one therapeutic agent.
    Type: Application
    Filed: October 7, 2005
    Publication date: May 11, 2006
    Inventors: P. Powell, Frank Molock, W. Martin, Thomas Rooney, Ranganath Raja, Holly Grammer, Osman Rathore, Shivkumar Mahadevan, Ram Bhat
  • Publication number: 20060047134
    Abstract: The present invention relates to a process comprising the steps of reacting in the presence of a hydrosilylation catalyst, a first reaction mixture comprising a free radical reactive compound and a silicon containing compound to form a silicon substituted glyceryl (meth)acrylate.
    Type: Application
    Filed: August 25, 2004
    Publication date: March 2, 2006
    Inventors: Frank Molock, Shivkumar Mahadevan, Robert Ward, Shanger Wang, James Parakka, Yuan Tian
  • Publication number: 20050258408
    Abstract: The invention provides a photochromic composition for use in tinting contact lenses in which the binding polymer used is capable of forming an interpenetrating polymer network with the lens material. When the photochromic compositions of the invention are applied to uncured lens material that is subsequently cured, the binding polymer forms an interpenetrating polymer network with the lens material embedding the photochromic compound within the lens material resulting in a stable, photochromic lens.
    Type: Application
    Filed: April 8, 2005
    Publication date: November 24, 2005
    Inventors: Frank Molock, Gina Cullerton, Terry Spaulding, Shivkumar Mahadevan
  • Publication number: 20050197505
    Abstract: The present invention relates to a process comprising the steps of reacting in the presence of an epoxide opening catalyst, a substituted epoxide, and preferably a silicone containing substituted epoxide with at least one carboxylic acid and at least one protecting agent to form a vicinal dialkyl ester or a vicinal disilyl ester.
    Type: Application
    Filed: May 6, 2005
    Publication date: September 8, 2005
    Inventors: Frank Molock, Joseph Hepting, Shivkumar Mahadevan
  • Patent number: 6933401
    Abstract: The present invention relates to a process comprising the steps of reacting in the presence of an epoxide opening catalyst, a substituted epoxide, and preferably a silicone containing substituted epoxide with at least one carboxylic acid and at least one protecting agent to form a vicinal dialkyl ester or a vicinal disilyl ester.
    Type: Grant
    Filed: June 30, 2003
    Date of Patent: August 23, 2005
    Inventors: Frank Molock, Joseph R. Hepting, Shivkumar Mahadevan
  • Publication number: 20050092680
    Abstract: The present invention relates to a process for the purification of silicone containing compounds via supercritical fluid extraction. Specifically, the present invention relates to a process comprising the steps of contacting at least one silicone containing compound with a supercritical fluid having a density of between about 0.2 and about 0.8 g/ml, decreasing said density so that two phases are formed a first phase comprising said at least one silicone containing compound and a second phase comprising at least one impurity and separating said second phase from said first phase.
    Type: Application
    Filed: October 31, 2003
    Publication date: May 5, 2005
    Inventors: Shivkumar Mahadevan, Frank Molock, Robert Ward, Yuan Tian, Shanger Wang, James Serpilio
  • Patent number: 6867172
    Abstract: Methods of reducing the adherence of lenses to hydrophobic packing materials using compounds of Formula I are disclosed herein, where R1-R12, a, b, z, x, q, m, and n are defined herein
    Type: Grant
    Filed: September 9, 2002
    Date of Patent: March 15, 2005
    Assignee: Johnson & Johnson Vision Care, Inc.
    Inventors: Nayiby Alvarez, Frank Molock, Azaam Alli, James D. Ford, Shivkumar Mahadevan
  • Publication number: 20050054745
    Abstract: The present invention relates to a process comprising polymerizing via irradiation from a light source, a reaction mixture comprising at least one monomer and at least one photoinitiator wherein at least about 90% of incident light emitted by the light source is filtered to produce a soluble, high molecular weight polymer.
    Type: Application
    Filed: October 19, 2004
    Publication date: March 10, 2005
    Inventors: Frank Molock, David Turner, Shivkumar Mahadevan, Joseph Hepting
  • Publication number: 20040267046
    Abstract: The present invention relates to a process comprising the steps of reacting in the presence of an epoxide opening catalyst, a substituted epoxide, and preferably a silicone containing substituted epoxide with at least one carboxylic acid and at least one protecting agent to form a vicinal dialkyl ester or a vicinal disilyl ester.
    Type: Application
    Filed: June 30, 2003
    Publication date: December 30, 2004
    Inventors: Frank Molock, Joseph R. Hepting, Shivkumar Mahadevan
  • Publication number: 20030130144
    Abstract: Methods of reducing the adherence of lenses to hydrophobic packing materials using compounds of Formula I are disclosed herein, where R1-R12, a, b, z, x, q, m, and n are defined herein.
    Type: Application
    Filed: September 9, 2002
    Publication date: July 10, 2003
    Inventors: Nayiby Alvarez, Frank Molock, Azaam Alli, James D. Ford, Shivkumar Mahadevan
  • Publication number: 20030052424
    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: Application
    Filed: August 2, 2001
    Publication date: March 20, 2003
    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