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: 20230066936
    Abstract: Described are polymerizable high energy light absorbing compounds. The compounds absorb various wavelengths of ultraviolet and/or high energy visible light and are suitable for incorporation in various products, such as biomedical devices and ophthalmic devices. Such devices exhibit a number of desirable properties, including providing wearers with favorable optical quality.
    Type: Application
    Filed: September 30, 2022
    Publication date: March 2, 2023
    Inventors: John R. Buch, Jie Xu, Patricia Martin, Shivkumar Mahadevan, Dawn D. Wright
  • Publication number: 20230060974
    Abstract: Described are polymerizable high energy light absorbing compounds of formula I: wherein R1, R2, R3, R4, R5, R6, R7, R8, R9, and X are as described herein. The compounds absorb various wavelengths of ultraviolet and/or high energy visible light and are suitable for incorporation in various products, such as biomedical devices and ophthalmic devices.
    Type: Application
    Filed: September 27, 2022
    Publication date: March 2, 2023
    Inventors: Stephen C. Arnold, Shivkumar Mahadevan, Ghulam Maharvi
  • Publication number: 20230037781
    Abstract: Described are visible light absorbing compounds. The compounds absorb various visible light wavelengths, such as in the region of 500 to 625 nm, and are suitable for incorporation in various products, such as biomedical devices and ophthalmic devices.
    Type: Application
    Filed: May 11, 2022
    Publication date: February 9, 2023
    Inventors: Michael J. Lopez, Shivkumar Mahadevan
  • Publication number: 20230023885
    Abstract: Provided is a process for making an ophthalmic devices and ophthalmic devices resulting from the process.
    Type: Application
    Filed: May 11, 2022
    Publication date: January 26, 2023
    Inventors: Michael J. Lopez, James D. Ford, Shivkumar Mahadevan, Stephanie Sheridan, Alejandra Isabel Garcia
  • Patent number: 11543683
    Abstract: Described are multifocal contact lenses that contain high energy visible (HEV) light absorbing compounds and their use for improving one or more vision attributes.
    Type: Grant
    Filed: July 24, 2020
    Date of Patent: January 3, 2023
    Assignee: Johnson & Johnson Vision Care, Inc.
    Inventors: Shivkumar Mahadevan, Dawn D. Wright, Ronald J. Clark, Thomas R. Karkkainen, Derek Nankivil
  • Patent number: 11493668
    Abstract: Described are polymerizable high energy light absorbing compounds of formula I: wherein R1, R2, R3, R4, R5, R6, R7, R8, R9, and X are as described herein. The compounds absorb various wavelengths of ultraviolet and/or high energy visible light and are suitable for incorporation in various products, such as biomedical devices and ophthalmic devices.
    Type: Grant
    Filed: August 22, 2019
    Date of Patent: November 8, 2022
    Assignee: Johnson & Johnson Vision Care, Inc.
    Inventors: Stephen C. Arnold, Shivkumar Mahadevan, Ghulam Maharvi
  • Publication number: 20220340759
    Abstract: Described are polymerizable high energy light absorbing compounds. The compounds absorb various wavelengths of ultraviolet and/or high energy visible light and are suitable for incorporation in various products, such as biomedical devices and ophthalmic devices. Such devices exhibit a number of desirable properties, including favorable rates of pervaporation.
    Type: Application
    Filed: June 29, 2022
    Publication date: October 27, 2022
    Inventors: Donald E. Riederer, Patricia Martin, Shivkumar Mahadevan, Dawn D. Wright, John R. Buch, Jessica Cannon
  • Publication number: 20220340760
    Abstract: Described are polymerizable high energy light absorbing compounds. The compounds absorb various wavelengths of ultraviolet and/or high energy visible light and are suitable for incorporation in various products, such as biomedical devices and ophthalmic devices.
    Type: Application
    Filed: June 30, 2022
    Publication date: October 27, 2022
    Inventors: Derek Nankivil, Shivkumar Mahadevan, Dawn D. Wright
  • Publication number: 20220194944
    Abstract: Described are visible light absorbing compounds. The compounds have a visible light absorption maximum between 430 and 480 nm and a full width half maximum (FWHM) at the visible light absorption maximum of at least 35 nm and up to 150 nanometers, wherein the compounds are photostable. The compounds are also thermally stable. The compounds substantially mimic the visible light absorbance properties of macular pigment while remaining photostable and thermally stable. The compounds may be used in a variety of articles, including ophthalmic devices.
    Type: Application
    Filed: November 29, 2021
    Publication date: June 23, 2022
    Inventor: Shivkumar Mahadevan
  • Patent number: 11360240
    Abstract: Provided is a contact lens system that comprises: a contact lens containing a photosensitive chromophore and a package surrounding the contact lens. The photosensitive chromophore has at least one active wavelength between 250 and 400 nanometers and at least one active wavelength between 400 and 450 nanometers. The package has a transmittance of no more than 99 percent at each active wavelength.
    Type: Grant
    Filed: November 19, 2020
    Date of Patent: June 14, 2022
    Assignee: Johnson & Johnson Vision Care, Inc.
    Inventors: Patricia Martin, Shivkumar Mahadevan
  • Publication number: 20220137262
    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: January 18, 2022
    Publication date: May 5, 2022
    Inventors: Wenjing Xiao, Barry Van Gemert, Shivkumar Mahadevan, Frank Molock
  • Patent number: 11256002
    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: Grant
    Filed: December 19, 2018
    Date of Patent: February 22, 2022
    Assignee: Johnson & Johnson Vision Care, Inc.
    Inventors: Wenjing Xiao, Barry Van Gemert, Shivkumar Mahadevan, Frank Molock
  • Publication number: 20210388141
    Abstract: Provided are imidazolium zwitterion polymerizable compounds and their applications in ophthalmic devices and packaging solutions. The zwitterionic polymerizable compounds are of formula I: wherein R1, R2, R3, L1, L2, and Rg are as described herein.
    Type: Application
    Filed: May 11, 2021
    Publication date: December 16, 2021
    Inventors: Shivkumar Mahadevan, Dola Sinha, Yong Zhang
  • Publication number: 20210388142
    Abstract: Provided are amino acid based polymerizable compounds and their applications in ophthalmic devices. The amino acid based polymerizable compounds are of formula I: wherein R, R1, and R2 are as described herein.
    Type: Application
    Filed: May 11, 2021
    Publication date: December 16, 2021
    Inventors: Shivkumar Mahadevan, Dola Sinha, Yong Zhang, Ghulam Maharvi
  • Publication number: 20210318469
    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: June 16, 2021
    Publication date: October 14, 2021
    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
  • Publication number: 20210309600
    Abstract: Described are polymerizable high energy light absorbing compounds of formula I: Wherein Y, Pg, R2, R3, R4, R5, and R6 are as described herein. The compounds absorb various wavelengths of ultraviolet and/or high energy visible light and are suitable for incorporation in various products, such as biomedical devices and ophthalmic devices.
    Type: Application
    Filed: May 27, 2021
    Publication date: October 7, 2021
    Inventors: Ghulam Maharvi, Shivkumar Mahadevan, Stephen C. Arnold, Patricia Martin, Leilani K. Sonoda, Dola Sinha
  • Publication number: 20210301088
    Abstract: Described are ophthalmic devices and methods for their preparation and use. The ophthalmic device comprises at least one heterocyclic ligand complexed with a transition metal, wherein the ophthalmic device is a polymerization reaction product of a reactive mixture comprising: (a) one or more monomers suitable for making the ophthalmic device; and (b) a heterocyclic ligand-containing monomer, and wherein the ophthalmic device has a transmittance at 400 nm of 90 percent or less.
    Type: Application
    Filed: February 8, 2021
    Publication date: September 30, 2021
    Inventors: Stephen C. Pegram, Dola Sinha, Shivkumar Mahadevan
  • Publication number: 20210261712
    Abstract: Provided are polymer compositions made by a process comprising: (a) providing a first reactive composition containing: (i) a polymerization initiator that is capable, upon a first activation, of forming two or more free radical groups, at least one of which is further activatable by subsequent activation; (ii) one or more ethylenically unsaturated compounds; and (iii) a crosslinker; (b) subjecting the first reactive composition to a first activation step such that the first reactive composition polymerizes therein to form a crosslinked substrate network containing a covalently bound activatable free radical initiator, (c) combining the crosslinked substrate network with a second reactive composition containing one or more ethylenically unsaturated compounds; and (d) activating the covalently bound activatable free radical initiator of the crosslinked substrate network such that the second reactive composition polymerizes therein with the crosslinked substrate network to form a grafted polymeric network and a
    Type: Application
    Filed: April 28, 2021
    Publication date: August 26, 2021
    Inventors: Brian Aitken, Charles Scales, Scott Joslin, Yong Zhang, Dola Sinha, Shivkumar Mahadevan, Patricia Martin, Fang Lu, Donnie Duis, Stephen C. Arnold
  • Patent number: 11067720
    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: Grant
    Filed: July 18, 2019
    Date of Patent: July 20, 2021
    Assignee: Johnson & Johnson Vision Care, Inc.
    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
  • Patent number: 11046636
    Abstract: Described are polymerizable high energy light absorbing compounds of formula I: Wherein Y, Pg, R1, R2, R3, R4, R5, and R6 are as described herein. The compounds absorb various wavelengths of ultraviolet and/or high energy visible light and are suitable for incorporation in various products, such as biomedical devices and ophthalmic devices.
    Type: Grant
    Filed: April 30, 2019
    Date of Patent: June 29, 2021
    Assignee: Johnson & Johnson Vision Care, Inc.
    Inventors: Ghulam Maharvi, Shivkumar Mahadevan, Stephen C. Arnold, Patricia Martin, Leilani K. Sonoda, Dola Sinha