Patents by Inventor Ramasamy Krishnan

Ramasamy Krishnan 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: 11912821
    Abstract: The present invention provides alkoxylated polymers. The alkoxylated polymers have two or more alkoxylated sites. The alkoxylated polymers can comprise any monomers and/or oligomers that contain one or more functional groups with an active hydrogen. The alkoxylated polymers are useful in any application for which polymers are generally used. For example, the alkoxylated polymers are useful as additives in ink and coating compositions.
    Type: Grant
    Filed: January 17, 2019
    Date of Patent: February 27, 2024
    Assignee: Sun Chemical Corporation
    Inventors: Ramasamy Krishnan, Ralph Arcurio, Russell Schwartz
  • Patent number: 11767395
    Abstract: Described herein is a polar non-aqueous dispersion comprising polar polymeric microparticles in a polar non-aqueous medium, the polar polymeric microparticles being insoluble in the medium and being produced by dispersion polymerization of vinyl monomers such as acrylate monomers in the medium in the presence of a polymeric acrylic stabilizer. Inks, coatings and overprint varnishes are formulated that employ the polar non-aqueous dispersion. Such inks, etc., exhibit superior chemical resistance properties, for example in one-part and two-part systems.
    Type: Grant
    Filed: March 13, 2017
    Date of Patent: September 26, 2023
    Assignee: Sun Chemical Corporation
    Inventors: Juanita M. Parris, Soichiro Omizu, Carl S. Weisbecker, Josie M. Rosen, Ralph Arcurio, Ramasamy Krishnan, Alex Chudolij
  • Patent number: 11643562
    Abstract: The present invention provides water-based energy curable compositions that exhibit improved printability, adhesion, opacity, and wash-up properties. The compositions comprise one or more inert water-based polyurethane resins and one or more water-based phosphate esters. Addition of the inert polyurethane resins and phosphate esters improves adhesion of the energy curable compositions to a variety of substrates.
    Type: Grant
    Filed: July 9, 2021
    Date of Patent: May 9, 2023
    Assignee: Sun Chemical Corporation
    Inventors: Ramasamy Krishnan, Mark Schneider, David Klein
  • Patent number: 11591482
    Abstract: Described herein are water-based inks that comprise water, a water miscible solvent having a boiling point of about 56° C. to about 98° C., and a latex. In one aspect, the water miscible solvent comprises about 10 wt % to about 30 wt % of the ink (based on the total weight of the ink). In another aspect, the latex is an alcohol-tolerant latex that exhibits limited or no particle size increase in the presence of alcohol. Further described herein are articles printed with the inks, and methods of printing with the inks.
    Type: Grant
    Filed: July 18, 2018
    Date of Patent: February 28, 2023
    Assignee: Sun Chemical Corporation
    Inventors: Ramasamy Krishnan, Russell Schwartz, Juanita Parris
  • Publication number: 20220275224
    Abstract: The present invention provides water-based energy curable compositions that exhibit improved printability, adhesion, opacity, and wash-up properties. The compositions comprise one or more inert water-based polyurethane resins and one or more water-based phosphate esters. Addition of the inert polyurethane resins and phosphate esters improves adhesion of the energy curable compositions to a variety of substrates.
    Type: Application
    Filed: July 9, 2021
    Publication date: September 1, 2022
    Applicant: SUN CHEMICAL CORPORATION
    Inventors: Ramasamy Krishnan, Mark Schneider, David Klein
  • Patent number: 10875338
    Abstract: Provided are web-offset lithographic ink compositions that contain an alkyl thioether surfactant, an alkoxylated modified rosin, or a combination thereof. The ink compositions can be oil-based inks or water-based inks that can be radiation-curable. The resulting ink compositions can be used in web-offset lithographic printing to substantially reduce or eliminate the ink feedback and ink build-up that occurs during printing. Also provided are methods for reducing or eliminating ink feedback and build-up during lithographic printing processes.
    Type: Grant
    Filed: September 20, 2012
    Date of Patent: December 29, 2020
    Assignee: SUN CHEMICAL CORPORATION
    Inventors: Ramasamy Krishnan, Jeff Jones, Matthias Helliblau
  • Patent number: 10851202
    Abstract: The present invention concerns polyester resins of General Formula I (HO—[R1R2C(CH2—)]a[—OCOCxHyCO2—]b[—CpHzO—]c—H) or General Formula II (HO—[R1R2C(CH2—)2]a[—OCOCxHyCO2—]b[—CH2CR3(CO2H)CH2O]d—H), wherein R1, R2, a, b, c, d, x, y, p, and z are as defined herein, for use in inks and coating compositions. The polyester resins of the present invention are particularly, but not exclusively, suitable to enhance the adhesion between a printing ink or coating composition and a substrate, especially a plastic substrate, to which it is applied. The polyester adhesion promoters of the invention are compatible with urethane-based inks and coating compositions.
    Type: Grant
    Filed: January 21, 2015
    Date of Patent: December 1, 2020
    Assignee: Sun Chemical Corporation
    Inventors: Ralph Arcurio, Alex Chudolij, Ramasamy Krishnan, Mark Schneider, Paul Hunt, Paul Smales
  • Patent number: 10845924
    Abstract: Described herein are capacitive devices and methods for producing same using printing methods such as flexography, gravure, offset, lithography, etc. The capacitive devices are formed from printing conductive inks, non-conductive inks, masking ink layers, graphic artwork layers, and overprint layers on a substrate. Interaction between a conductive ink layer of the capacitive device with a touch screen device of a computer, tablet, smart phone, etc. causes a capacitive effect that allows information coded in capacitive device to be read, leading to an activity such as the download of content to the device having the touch screen.
    Type: Grant
    Filed: October 18, 2016
    Date of Patent: November 24, 2020
    Assignee: SUN CHEMICAL CORPORATION
    Inventors: Mathew Mathew, Ramasamy Krishnan
  • Publication number: 20200216689
    Abstract: Described herein are water-based inks that comprise water, a water miscible solvent having a boiling point of about 56° C. to about 98° C., and a latex. In one aspect, the water miscible solvent comprises about 10 wt % to about 30 wt % of the ink (based on the total weight of the ink). In another aspect, the latex is an alcohol-tolerant latex that exhibits limited or no particle size increase in the presence of alcohol. Further described herein are articles printed with the inks, and methods of printing with the inks.
    Type: Application
    Filed: July 18, 2018
    Publication date: July 9, 2020
    Applicant: SUN CHEMICAL CORPORATION
    Inventors: Ramasamy Krishnan, Russell Schwartz, Juanita Parris
  • Patent number: 10654303
    Abstract: Provided are web-offset lithographic ink compositions that contain an alkyl thioether surfactant, an alkoxylated modified rosin, or a combination thereof. The ink compositions can be oil-based inks or water-based inks that can be radiation-curable. The resulting ink compositions can be used in web-offset lithographic printing to substantially reduce or eliminate the ink feedback and ink build-up that occurs during printing. Also provided are methods for reducing or eliminating ink feedback and build-up during lithographic printing processes.
    Type: Grant
    Filed: September 20, 2012
    Date of Patent: May 19, 2020
    Assignee: SUN CHEMICAL CORPORATION
    Inventors: Ramasamy Krishnan, Jeff Jones, Matthias Helliblau
  • Publication number: 20190284335
    Abstract: The present invention concerns polyester resins of General Formula I (HO—[R1R2C(CH2—)]a[—OCOCxHyCO2—]b[—CpHzO—]c—H) or General Formula II (HO—[R1R2C(CH2—)2]a[—OCOCxHyCO2—]b[—CH2CR3(CO2H)CH2O]d—H), wherein R1, R2, a, b, c, d, x, y, p, and z are as defined herein, for use in inks and coating compositions. The polyester resins of the present invention are particularly, but not exclusively, suitable to enhance the adhesion between a printing ink or coating composition and a substrate, especially a plastic substrate, to which it is applied. The polyester adhesion promoters of the invention are compatible with urethane-based inks and coating compositions.
    Type: Application
    Filed: May 31, 2019
    Publication date: September 19, 2019
    Applicant: SUN CHEMICAL CORPORATION
    Inventors: Ralph ARCURIO, Alex CHUDOLIJ, Ramasamy KRISHNAN, Mark SCHNEIDER, Paul HUNT, Paul SMALES
  • Publication number: 20190144604
    Abstract: The present invention provides alkoxylated polymers. The alkoxylated polymers have two or more alkoxylated sites. The alkoxylated polymers can comprise any monomers and/or oligomers that contain one or more functional groups with an active hydrogen. The alkoxylated polymers are useful in any application for which polymers are generally used. For example, the alkoxylated polymers are useful as additives in ink and coating compositions.
    Type: Application
    Filed: January 17, 2019
    Publication date: May 16, 2019
    Applicant: SUN CHEMICAL CORPORATION
    Inventors: Ramasamy Krishnan, Ralph Arcurio, Russell Schwartz
  • Patent number: 10266709
    Abstract: The present invention is directed to energy curable offset conductive inks and hybrid offset conductive ink compositions that contain an oxidative curable ink and the energy curable offset conductive ink. The conductive inks and ink compositions exhibit low levels of resistance and hence have superior conductivity.
    Type: Grant
    Filed: May 19, 2015
    Date of Patent: April 23, 2019
    Assignee: SUN CHEMICAL CORPORATION
    Inventors: Ramasamy Krishnan, Mark Schneider, Dan Rubik, Kacy Schultz, Juanita Parris
  • Publication number: 20190112404
    Abstract: Described herein is a polar non-aqueous dispersion comprising polar polymeric microparticles in a polar non-aqueous medium, the polar polymeric microparticles being insoluble in the medium and being produced by dispersion polymerization of vinyl monomers such as acrylate monomers in the medium in the presence of a polymeric acrylic stabilizer. Inks, coatings and overprint varnishes are formulated that employ the polar non-aqueous dispersion. Such inks, etc., exhibit superior chemical resistance properties, for example in one-part and two-part systems.
    Type: Application
    Filed: March 13, 2017
    Publication date: April 18, 2019
    Applicant: SUN CHEMICAL CORPORATION
    Inventors: Juanita M. Parris, Soichiro Omizu, Carl S. Weisbecker, Josie M. Rosen, Ralph Arcurio, Ramasamy KRISHNAN
  • Publication number: 20180314359
    Abstract: Described herein are capacitive devices and methods for producing same using printing methods such as flexography, gravure, offset, lithography, etc. The capacitive devices are formed from printing conductive inks, non-conductive inks, masking ink layers, graphic artwork layers, and overprint layers on a substrate. Interaction between a conductive ink layer of the capacitive device with a touch screen device of a computer, tablet, smart phone, etc. causes a capacitive effect that allows information coded in capacitive device to be read, leading to an activity such as the download of content to the device having the touch screen.
    Type: Application
    Filed: October 18, 2016
    Publication date: November 1, 2018
    Applicant: SUN CHEMICAL CORPORATION
    Inventors: Mathew MATHEW, Ramasamy KRISHNAN
  • Patent number: 9988550
    Abstract: Provided are overprint varnish (OPV) compositions containing high viscosity essentially non-aqueous dispersions that include acrylic core/shell polymer particles in a non-aqueous solvent such as mineral oil. Also provided are methods of coating a substrate with an OPV containing the non-aqueous dispersions to improve the properties of the OPV when used to coat a substrate, such as improved rub resistance, resistance to yellowing, and desirable gloss values.
    Type: Grant
    Filed: December 6, 2012
    Date of Patent: June 5, 2018
    Assignee: SUN CHEMICAL CORPORATION
    Inventors: Jerome Bollard, Richard Durand, Ramasamy Krishnan, Hiroyuki Sugiyama
  • Publication number: 20170101505
    Abstract: The present invention provides alkoxylated polymers. The alkoxylated polymers have two or more alkoxylated sites. The alkoxylated polymers can comprise any monomers and/or oligomers that contain one or more functional groups with an active hydrogen. The alkoxylated polymers are useful in any application for which polymers are generally used. For example, the alkoxylated polymers are useful as additives in ink and coating compositions.
    Type: Application
    Filed: May 21, 2015
    Publication date: April 13, 2017
    Applicant: SUN CHEMICAL CORPORATION
    Inventors: Ramasamy Krishnan, Ralph Arcurio, Russell Schwartz
  • Publication number: 20170088725
    Abstract: The present invention is directed to energy curable offset conductive inks and hybrid offset conductive ink compositions that contain an oxidative curable ink and the energy curable offset conductive ink. The conductive inks and ink compositions exhibit low levels of resistance and hence have superior conductivity.
    Type: Application
    Filed: May 19, 2015
    Publication date: March 30, 2017
    Applicant: SUN CHEMICAL CORPORATION
    Inventors: Ramasamy Krishnan, Mark Schneider, Dan Rubik, Kacy Schultz, Juanita Parris
  • Publication number: 20160333142
    Abstract: The present invention concerns polyester resins of General Formula I (HO—[R1R2C(CH2—)]a[—OCOCxHyCO2—]b[—CpHzO—]c—H) or General Formula II (HO—[R1R2C(CH2—)2]a[—OCOCxHyCO2—]b[—CH2CR3(CO2H)CH2O]d—H), wherein R1, R2, a, b, c, d, x, y, p, and z are as defined herein, for use in inks and coating compositions. The polyester resins of the present invention are particularly, but not exclusively, suitable to enhance the adhesion between a printing ink or coating composition and a substrate, especially a plastic substrate, to which it is applied. The polyester adhesion promoters of the invention are compatible with urethane-based inks and coating compositions.
    Type: Application
    Filed: January 21, 2015
    Publication date: November 17, 2016
    Applicant: SUN CHEMICAL CORPORATION
    Inventors: Ralph ARCURIO, Alex CHUDOLIJ, Ramasamy KRISHNAN, Mark SCHNEIDER, Paul HUNT, Paul SMALES
  • Patent number: 9441120
    Abstract: Lithographic printing inks are described, which are characterized by the inclusion of both water, in a substantially emulsified form, and inorganic filler. Inks of the present invention show improved printing properties in offset lithography, including improved transfer, reduced piling and improved mileage. They also offer cost advantages over currently available inks and the ability to minimize or eliminate entirely mineral oil from their compositions. The inks of the present invention may be used in both web-based print processes including coldset and heatset, as well as in sheetfed printing. The inks may be dried to a durable ink film at ambient temperature, with thermal energy or with actinic or electron beam radiation, or with any combination thereof.
    Type: Grant
    Filed: June 14, 2013
    Date of Patent: September 13, 2016
    Assignee: SUN CHEMICAL CORPORATION
    Inventors: Reiner Jung, Jochen Gattermayer, Kai-Uwe Gaudl, Ramasamy Krishnan, Lars Keller, Cumhur Bilgic, Jeff Jones, Jeff Newton, Adelbert Dettling, Russell Schwartz