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).

  • Patent number: 12054499
    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: Grant
    Filed: May 11, 2022
    Date of Patent: August 6, 2024
    Assignee: Johnson & Johnson Vision Care, Inc.
    Inventors: Michael J. Lopez, Shivkumar Mahadevan
  • Publication number: 20240228466
    Abstract: Described are visible light absorbing ophthalmic devices that are easily prepared from an ophthalmic device precursor. The ophthalmic device precursor is a polymerization reaction product of a reactive mixture comprising: (a) a heterocyclic ligand of formula I: wherein m, n, t, R1, R2, and R3 are as described herein; and (b) a monomer suitable for making the ophthalmic device precursor.
    Type: Application
    Filed: October 31, 2023
    Publication date: July 11, 2024
    Inventors: Michael J. Lopez, Shivkumar Mahadevan
  • Patent number: 11993037
    Abstract: A method or use of a contact lens, includes applying to at least one eye of a contact lens wearer the contact lens that is a free radical reaction product of a reactive mixture that includes one or more polymerizable compounds suitable for making the contact lens; and a high energy visible (HEV) light absorbing compound; and improving, by the contact lens, at least one clinical attribute comprising overall preference of the contact lens while using computer screens and digital devices as observed by the contact lens wearer, comfort at the end of the day, CLUE Comfort score, CLUE Vision score.
    Type: Grant
    Filed: December 16, 2021
    Date of Patent: May 28, 2024
    Assignee: Johnson & Johnson Vision Care, Inc.
    Inventors: Shivkumar Mahadevan, Dawn D. Wright, Patricia Martin, Jie Xu, John R. Buch
  • Patent number: 11970431
    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: Grant
    Filed: May 27, 2021
    Date of Patent: April 30, 2024
    Assignee: Johnson & Johnson Vision Care, Inc.
    Inventors: Ghulam Maharvi, Shivkumar Mahadevan, Stephen C. Arnold, Patricia Martin, Leilani K. Sonoda, Dola Sinha
  • Patent number: 11958824
    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 100 nanometers, wherein the compounds are photostable. The compounds substantially mimic the visible light absorbance properties of macular pigment while remaining photostable. The compounds may be used in a variety of articles, including ophthalmic devices.
    Type: Grant
    Filed: June 11, 2020
    Date of Patent: April 16, 2024
    Assignee: Johnson & Johnson Vision Care, Inc.
    Inventor: Shivkumar Mahadevan
  • Patent number: 11945180
    Abstract: The present invention relates to a method of manufacturing a contact lens including the steps of: (i) adding reactive components to a mold, wherein the reactive components comprise (a) at least one hydroxy-containing silicone component having a weight average molecular weight from about 200 to about 15,000 g/mole and (b) at least one mono-ether terminated, mono-methacrylate terminated polyethylene glycol having a weight average molecular weight from about 200 to about 10,000 g/mole; (ii) curing the reactive components within the mold to form the contact lens; and (iii) removing the contact lens from said mold.
    Type: Grant
    Filed: October 1, 2020
    Date of Patent: April 2, 2024
    Assignee: Johnson & Johnson Vision Care, Inc.
    Inventors: Azaam Alli, Shivkumar Mahadevan
  • Publication number: 20240084077
    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: October 27, 2023
    Publication date: March 14, 2024
    Inventors: Stephen C. Pegram, Dola Sinha, Shivkumar Mahadevan
  • Publication number: 20240067825
    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: October 19, 2023
    Publication date: February 29, 2024
    Inventors: Shivkumar Mahadevan, Dawn D. Wright
  • Publication number: 20240067622
    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 100 nanometers, wherein the compounds are photostable. The compounds substantially mimic the visible light absorbance properties of macular pigment while remaining photostable. The compounds may be used in a variety of articles, including ophthalmic devices.
    Type: Application
    Filed: October 23, 2023
    Publication date: February 29, 2024
    Inventor: Shivkumar Mahadevan
  • Patent number: 11912800
    Abstract: Provided are compounds that may function as functionalized polymerization initiators, for instance in the manufacture of ophthalmic lenses, and to methods of such manufacture. The compounds are of formula I: wherein R1, R2, R3, R4, R5, T, p, q, and n are as defined herein.
    Type: Grant
    Filed: August 22, 2022
    Date of Patent: February 27, 2024
    Assignee: Johnson & Johnson Vision Care, Inc.
    Inventors: Michael F. Widman, Ghulam Maharvi, Shivkumar Mahadevan, Azaam Alli, Alexander Guzman, Xin Wei, Minghan Chen
  • Publication number: 20240043598
    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: October 12, 2023
    Publication date: February 8, 2024
    Inventors: Brian Aitken, Charles Scales, Scott Joslin, Yong Zhang, Dola Sinha, Shivkumar Mahadevan, Patricia Martin, Fang Lu, Donnie Duis, Stephen C. Arnold
  • Publication number: 20240018294
    Abstract: Provided are ophthalmic devices comprised of a reaction product of a composition comprising: (i) a crosslinked substrate network containing covalently bound activatable free radical initiators; and (ii) a grafting composition containing one or more ethylenically unsaturated compounds. Also provided are processes for making ophthalmic devices.
    Type: Application
    Filed: September 15, 2023
    Publication date: January 18, 2024
    Inventors: Brian Aitken, Charles Scales, Scott Joslin, Yong Zhang, Dola Sinha, Shivkumar Mahadevan, Patricia Martin, Fang Lu, Donnie Duis, Stephen C. Arnold
  • Patent number: 11874434
    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: January 18, 2022
    Date of Patent: January 16, 2024
    Assignee: Johnson & Johnson Vision Care, Inc.
    Inventors: Wenjing Xiao, Barry Van Gemert, Shivkumar Mahadevan, Frank Molock
  • Patent number: 11834547
    Abstract: Provided are ophthalmic devices comprised of a reaction product of a composition comprising: (i) a crosslinked substrate network containing covalently bound activatable free radical initiators; and (ii) a grafting composition containing one or more ethylenically unsaturated compounds. Also provided are processes for making ophthalmic devices.
    Type: Grant
    Filed: February 25, 2021
    Date of Patent: December 5, 2023
    Assignee: Johnson & Johnson Vision Care, Inc.
    Inventors: Brian Aitken, Charles Scales, Scott Joslin, Yong Zhang, Dola Sinha, Shivkumar Mahadevan, Patricia Martin, Fang Lu, Donnie Duis, Stephen C. Arnold
  • Patent number: 11820850
    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: Grant
    Filed: April 28, 2021
    Date of Patent: November 21, 2023
    Assignee: Johnson & Johnson Vision Care, Inc.
    Inventors: Brian Aitken, Charles Scales, Scott Joslin, Yong Zhang, Dola Sinha, Shivkumar Mahadevan, Patricia Martin, Fang Lu, Donnie Duis, Stephen C. Arnold
  • Patent number: 11820899
    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: Grant
    Filed: December 3, 2020
    Date of Patent: November 21, 2023
    Assignee: Johnson & Johnson Vision Care, Inc.
    Inventors: Shivkumar Mahadevan, Dawn D. Wright
  • Publication number: 20230296807
    Abstract: Described are contact lenses containing light absorbing chromophores, wherein the light absorbing chromophore is concentrated in one or more select regions of the lens. Also described are methods for making such contact lenses.
    Type: Application
    Filed: November 2, 2022
    Publication date: September 21, 2023
    Inventors: Brian Aitken, Shivkumar Mahadevan
  • Publication number: 20230288728
    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: Application
    Filed: November 30, 2022
    Publication date: September 14, 2023
    Inventors: Shivkumar Mahadevan, Dawn D. Wright, Ronald J. Clark, Thomas R. Karkkainen, Derek Nankivil
  • Publication number: 20230176251
    Abstract: Provided is a method for forming an ophthalmic lens as well as a lens formed by such method. The method includes the curing of a reactive monomer mixture within a mold assembly under conditions to permit incorporation of functional features into selective portions of the ophthalmic lens.
    Type: Application
    Filed: August 22, 2022
    Publication date: June 8, 2023
    Inventors: Michael F. Widman, Ghulam Maharvi, Shivkumar Mahadevan, Azaam Alli, Alexander Guzman, Xin Wei, Minghan Chen
  • Publication number: 20230117655
    Abstract: Described are polymerizable fused tricyclic compounds of formula I: wherein R1, R2, R3, m, n, t, and rings B, C, and D are as defined herein. The compounds absorb various wavelengths of ultraviolet and/or visible light (such as high energy visible light) and are suitable for incorporation in a variety of products, such as biomedical devices and ophthalmic devices.
    Type: Application
    Filed: December 13, 2022
    Publication date: April 20, 2023
    Inventors: Shivkumar Mahadevan, Dawn D. Wright