Patents by Inventor Jagdish Jethmalani

Jagdish Jethmalani 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: 11780950
    Abstract: The present invention is based, in part, on the discovery that the polymeric materials described herein produce polyurethane copolymers with advantageous optical properties. In particular embodiments, polyurethane copolymers comprise repeating units of isosorbide and a difunctional linker where the difunctional linkers can be diisocyanate, diisothiocyanate, dicarboxylic acid, and other monomers. Some of the advantageous optical properties of these polymeric materials include a refractive index of about 1.5 and an Abbe value of at least about 50. Also described are methods for producing these polyurethane copolymers.
    Type: Grant
    Filed: May 1, 2020
    Date of Patent: October 10, 2023
    Inventors: Ray F. Stewart, Monica Bhatia, Jagdish Jethmalani, Sanjiban Chakraborty
  • Publication number: 20220396043
    Abstract: Provided herein are methods of molding thermoplastic polymers into optical elements. The optical elements in the form of cylindrical discs, semi-finished lens blanks or finished lenses are compression molded at high temperature typically above thermoplastic polymers softening temperature and under high pressure. The semi-finished lens blanks and finished lenses are molded using front and back glass molds inside a mold assembly which reshapes the cylindrical discs that are either previously molded or cut out from thick slab. Also provided are methods for producing single vision and progressive addition lens prescriptions.
    Type: Application
    Filed: August 22, 2022
    Publication date: December 15, 2022
    Inventors: Jagdish JETHMALANI, Sanjiban CHAKRABORTY, Monica BHATIA
  • Patent number: 11446887
    Abstract: Provided herein are methods of molding thermoplastic polymers into optical elements. The optical elements in the form of cylindrical discs, semi-finished lens blanks or finished lenses are compression molded at high temperature typically above thermoplastic polymers softening temperature and under high pressure. The semi-finished lens blanks and finished lenses are molded using front and back glass molds inside a mold assembly which reshapes the cylindrical discs that are either previously molded or cut out from thick slab. Also provided are methods for producing single vision and progressive addition lens prescriptions.
    Type: Grant
    Filed: October 26, 2020
    Date of Patent: September 20, 2022
    Assignee: NOVOL, INC.
    Inventors: Jagdish Jethmalani, Sanjiban Chakraborty, Monica Bhatia
  • Publication number: 20210046717
    Abstract: Provided herein are methods of molding thermoplastic polymers into optical elements. The optical elements in the form of cylindrical discs, semi-finished lens blanks or finished lenses are compression molded at high temperature typically above thermoplastic polymers softening temperature and under high pressure. The semi-finished lens blanks and finished lenses are molded using front and back glass molds inside a mold assembly which reshapes the cylindrical discs that are either previously molded or cut out from thick slab. Also provided are methods for producing single vision and progressive addition lens prescriptions.
    Type: Application
    Filed: October 26, 2020
    Publication date: February 18, 2021
    Inventors: Jagdish JETHMALANI, Sanjiban CHAKRABORTY, Monica BHATIA
  • Publication number: 20200354507
    Abstract: Provided herein are crosslinked optical copolymers comprising a monomer derived from sorbitol, and a trifunctional linker. The crosslinked optical copolymers have a refractive index value greater than 1.5 and an Abbe value greater than 45. Also provided are methods for producing the provided crosslinked optical copolymers, and corrective lenses that include the provided crosslinked optical copolymers.
    Type: Application
    Filed: July 23, 2020
    Publication date: November 12, 2020
    Inventors: Monica BHATIA, Jagdish JETHMALANI, Sanjiban CHAKRABORTY
  • Patent number: 10696778
    Abstract: The present invention is based, in part, on the discovery that the polymeric materials described herein produce polyurethane copolymers with advantageous optical properties. In particular embodiments, polyurethane copolymers comprise repeating units of isosorbide and a difunctional linker where the difunctional linkers can be diisocyanate, dithiocyanate, dicarboxylic acid, and other monomers. Some of the advantageous optical properties of these polymeric materials include a refractive index of about 1.5 and an Abbe value of at least about 50. Also described are methods for producing these polyurethane copolymers.
    Type: Grant
    Filed: January 25, 2018
    Date of Patent: June 30, 2020
    Assignee: NOVOL, INC.
    Inventors: Ray F. Stewart, Monica Bhatia, Jagdish Jethmalani, Sanjiban Chakraborty
  • Publication number: 20150293382
    Abstract: A method of virtually fitting an eyeglass frame is disclosed. A virtual try-on module receives an image of a user wearing an existing eyeglass frame from a user device; determines eyeglass frame dimension information; determines pupil diameter and segment height; determines a set of frames based on a bridge dimension; and sends the determined set of frames to the user device for display. Another method of virtually fitting an eyeglass frame to a user is also disclosed. A virtual try-on module receives image and eyeglass frame dimension information; determines pupil diameter and segment height; provides a sample set of eyeglass frames, each eyeglass frame in the set of eyeglass frames having lenses with pad printer marks; determines a subset of the sample set of eyeglass frames; and sends the determined subset of frames to the user device for display on the user device of the user.
    Type: Application
    Filed: April 8, 2015
    Publication date: October 15, 2015
    Inventors: Jagdish Jethmalani, Rishi Pampati, Rudolf Suter
  • Publication number: 20150277154
    Abstract: A method for providing eyewear to a customer includes touchlessly scanning eyewear selected by a customer with a laser tracer having a laser-camera assembly, producing from the laser-camera scan an electronic 3D representation of at least a portion of the eyewear, electronically transmitting the 3D representation to an eyewear part manufacturer, and, based upon the 3D representation received, manufacturing a finished eyewear product having the eyeglass prescription of the customer. An eyewear scanning system as the laser tracer employs the method by holding the eyewear within a housing. A scanner subassembly has the laser-camera assembly with the camera positioned at a fixed angle to the laser and sighted toward the eyewear. A scanner movement assembly moves the scanner subassembly with respect to the eyewear. A computer is programmed to conduct a scan of the eyewear with the laser and the camera and to produce the three-dimensional representation.
    Type: Application
    Filed: August 26, 2014
    Publication date: October 1, 2015
    Inventors: William T. Hofmeister, Rishi Pampati, Jagdish Jethmalani, Rudolf Suter
  • Publication number: 20150216409
    Abstract: An autorefractor-keratometer device including a first laser scanning device that emits a plurality of laser scans, a second laser device that emits a laser pulse, a first detector that detects the plurality of emitted laser line scans to determine corneal topography, and a second detector that detects a reflection of the emitted laser pulse to determine sphero-cylinder refraction.
    Type: Application
    Filed: February 4, 2015
    Publication date: August 6, 2015
    Inventors: William T. Hofmeister, Rishi Pampati, Jagdish Jethmalani, Rudolf Suter
  • Publication number: 20130296452
    Abstract: Monomers and polymers used in making spectacle lenses are disclosed. A thermal curing process is disclosed that includes a latent thermal cationic acid generator and optionally a cationic photoinitiator.
    Type: Application
    Filed: July 10, 2013
    Publication date: November 7, 2013
    Inventors: Jagdish JETHMALANI, Gomaa ABDEL-SADEK, Jeffrey CHOMYN, Erdem CETIN, Lawrence H. SVERDRUP, Shawn MCCARTY, Junhao GE
  • Publication number: 20110255156
    Abstract: An optical element includes a first lens; a cover; and a cured matrix polymer sandwiched between the first lens and the cover; the matrix polymer, prior to curing, having a monomer mixture dispersed therein; the matrix polymer being selected from the group consisting of polyester, polystyrene, polyacrylate, thiol-cured epoxy polymer, thiol-cured isocyanate polymer, and mixtures thereof; and the monomer mixture comprising a thiol monomer and at least one second monomer selected from the group consisting of ene monomer and yne monomer.
    Type: Application
    Filed: September 15, 2010
    Publication date: October 20, 2011
    Applicant: Ophthonix, Inc.
    Inventors: Jagdish JETHMALANI, Andreas W. Dreher, Gomaa Abdel-Sadek, Jeffrey Chomyn, Jieming Li, Maher Qaddoura
  • Patent number: 7821719
    Abstract: An optical element includes a first lens; a cover; and a cured matrix polymer sandwiched between the first lens and the cover; the matrix polymer, prior to curing, having a monomer mixture dispersed therein; the matrix polymer being selected from the group consisting of polyester, polystyrene, polyacrylate, thiol-cured epoxy polymer, thiol-cured isocyanate polymer, and mixtures thereof; and the monomer mixture comprising a thiol monomer and at least one second monomer selected from the group consisting of ene monomer and yne monomer.
    Type: Grant
    Filed: November 6, 2007
    Date of Patent: October 26, 2010
    Assignee: Ophthonix, Inc.
    Inventors: Jagdish Jethmalani, Andreas W. Dreher, Gomaa Abdel-Sadek, Jeffrey Chomyn, Jieming Li, Maher Qaddoura
  • Patent number: 7371804
    Abstract: Compositions comprising a matrix polymer and a mixture of monomers are used for making polymer mixtures containing the matrix polymer and a second polymer formed from the monomer mixture. Preferably, the matrix polymer comprises a polyester, polystyrene, polyacrylate, thiol-cured epoxy polymer, thiol-cured isocyanate polymer, or mixtures thereof. Preferably, the monomer mixture comprises a thiol monomer and at least one second monomer selected from the group consisting of ene monomer and yne monomer. The compositions may be used to fabricate optical elements such as lenses.
    Type: Grant
    Filed: September 7, 2004
    Date of Patent: May 13, 2008
    Assignee: Ophthonix, Inc.
    Inventors: Jagdish Jethmalani, Andreas W. Dreher, Gomaa Abdel-Sadek, Jeffrey Chomyn, Jieming Li, Maher Qaddoura
  • Publication number: 20080088793
    Abstract: The subject invention provides lenses, and methods for designing and manufacturing these lenses, with reduced chromatic aberration. Advantageously, these lenses are specifically designed to correct chromatic aberration that results as multichromatic light passes through the lenses.
    Type: Application
    Filed: September 25, 2007
    Publication date: April 17, 2008
    Inventors: Lawrence Sverdrup, Sean Sigarlaki, Jagdish Jethmalani, Andreas Dreher, Jeffrey Chomyn
  • Publication number: 20080086207
    Abstract: The invention relates to novel intraocular lenses. The lenses are capable of post-operative adjustment of their optical properties, including conversion from single focal lenses to multifocal lenses.
    Type: Application
    Filed: October 12, 2007
    Publication date: April 10, 2008
    Applicant: CALHOUN VISION, INC.
    Inventors: Christian Sandstedt, Jagdish Jethmalani, Shiao Chang
  • Publication number: 20080071002
    Abstract: Monomers and polymers used in making spectacle lenses are disclosed. A thermal curing process is disclosed that includes a latent thermal cationic acid generator and optionally a cationic photoinitiator.
    Type: Application
    Filed: March 20, 2007
    Publication date: March 20, 2008
    Inventors: Jagdish Jethmalani, Gomaa Abdel-Sadek, Jeffrey Chomyn, Erdem Cetin, Lawrence Sverdrup, Shawn McCarty, Junhao Ge
  • Publication number: 20080068723
    Abstract: An optical element includes a first lens; a cover; and a cured matrix polymer sandwiched between the first lens and the cover; the matrix polymer, prior to curing, having a monomer mixture dispersed therein; the matrix polymer being selected from the group consisting of polyester, polystyrene, polyacrylate, thiol-cured epoxy polymer, thiol-cured isocyanate polymer, and mixtures thereof; and the monomer mixture comprising a thiol monomer and at least one second monomer selected from the group consisting of ene monomer and yne monomer.
    Type: Application
    Filed: November 6, 2007
    Publication date: March 20, 2008
    Applicant: Ophthonix, Inc.
    Inventors: Jagdish JETHMALANI, Andreas Dreher, Gomaa Abdel-Sadek, Jeffrey Chomyn, Jieming Li, Maher Qaddoura
  • Publication number: 20080018853
    Abstract: Disclosed herein are photopolymerizable compositions and formulations that comprise photochromic dyes, photochromic blue light blocking dyes, permanent dyes, permanent blue blocking dyes, and/or their combinations. In some variations, these formulations are suited for example, for sandwiching between lens blanks to form semi-finished lens assemblies to form a tinted lens useful in sunglasses. The formulations are also suitable for correcting optical aberrations, and may provide a photochromic effect when exposed to sunlight.
    Type: Application
    Filed: March 20, 2007
    Publication date: January 24, 2008
    Inventors: Jagdish Jethmalani, Gomaa Abdelsadek, Erdem Cetin, Shawn McCarty, Junhao Ge
  • Publication number: 20070285799
    Abstract: The subject invention provides methods for creating wavefront aberrators with a desired refractive index profile that is stable against thermal and/or solar exposure. The invention further provides wavefront aberrators produced according to the methods described herein.
    Type: Application
    Filed: January 16, 2007
    Publication date: December 13, 2007
    Inventors: Andreas Dreher, Jagdish Jethmalani, Larry Sverdrup, Jeffrey Chomyn
  • Publication number: 20070285617
    Abstract: The present invention provides an ophthalmic lens comprised of two lens materials with a gap between them of less than about 5 mm. The gap is formed and maintained by particles on the perimeter of the surfaces of both lens materials. Methods are also provided for creating a gap between two lens materials and for producing an ophthalmic lens with a gap between two lens materials.
    Type: Application
    Filed: March 20, 2007
    Publication date: December 13, 2007
    Inventors: Gary Mills, Gomaa Abdelsadek, Laurence Warden, Jagdish Jethmalani