Patents by Inventor Purushothaman Kesavan

Purushothaman Kesavan 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: 11932777
    Abstract: Compositions and methods are described which provide a protective coating to coils or springs via a polymerization process such as by covalent bonding that includes grafting to the metal surface.
    Type: Grant
    Filed: December 9, 2022
    Date of Patent: March 19, 2024
    Assignee: Winamac Coil Spring, Inc.
    Inventors: Paul Thottathil, John M. Ryan, Purushothaman Kesavan, Satyabrata Mukherjee
  • Publication number: 20230119478
    Abstract: The present invention relates to coating compositions and methods of forming catalyst-containing coatings on substrates for catalytic heater devices. The coatings are formed by a chemical grafting method, which chemically bonds the coating (and catalysts contained therein) to the substrate. The resulting coatings have high temperature resistance and inhibit or prevent catalyst migration to the substrate, thereby maintaining catalytic activity and desired temperatures over prolonged use.
    Type: Application
    Filed: October 12, 2022
    Publication date: April 20, 2023
    Inventors: Paul Thottathil, Satyabrata Mukherjee, Purushothaman Kesavan, John Ryan
  • Publication number: 20230113121
    Abstract: Compositions and methods are described which provide a protective coating to coils or springs via a polymerization process such as by covalent bonding that includes grafting to the metal surface.
    Type: Application
    Filed: December 9, 2022
    Publication date: April 13, 2023
    Inventors: Paul Thottathil, John M. Ryan, Purushothaman Kesavan, Satyabrata Mukherjee
  • Patent number: 11549021
    Abstract: Compositions and methods are described which provide a protective coating to coils or springs via a polymerization process such as by covalent bonding that includes grafting to the metal surface.
    Type: Grant
    Filed: September 29, 2020
    Date of Patent: January 10, 2023
    Assignee: Winimac Coil Spring, Inc.
    Inventors: Paul Thottathil, John M. Ryan, Purushothaman Kesavan, Satyabrata Mukherjee
  • Patent number: 11492510
    Abstract: This invention relates to a coating comprising prepolymer and monomers for application onto polyurethane for chemical resistance, abrasion resistance, water proof etc. Usually polyurethane is porous and does not have sufficient stain, abrasion and chemical resistance. The said coatings developed using technology of chemical grafting that involves the use of prepolymers, monomers, catalyst, graft initiator, wetting agents, fillers and other ingredients of the composition. The coating thus obtained when applied on the polyurethane allows obtaining graft polymerization, thereby forming a polymeric film chemically attached to the substrate. The polyurethane substrate is reacted with craft initiator which creates the reaction sites on the substrate via free radical mechanism.
    Type: Grant
    Filed: June 16, 2017
    Date of Patent: November 8, 2022
    Assignee: ERGOCENTRIC INC.
    Inventors: Terry Cassaday, John Ryan, Paul Thottathil, Purushothaman Kesavan, Satyabrata Mukherjee
  • Publication number: 20210041331
    Abstract: This subject technology relates to a polymeric composition for application onto substrates, such as stainless steel blades, for lubricity, abrasion resistance, and corrosion resistance. The coatings developed using the subject technology of chemical grafting in one aspect involves the use of prepolymer, monomers, catalysts, graft initiator, wetting agent, fillers and other ingredients of the composition. The coating thus obtained when applied on the stainless steel allows obtaining graft polymerization, thereby forming a polymer film chemically attached to the substrate. The substrate is reacted with graft initiators which create reaction sites on the substrate via a free radical mechanism that renders the substrate receptive to attachment of monomers/prepolymers, thus forming a polymeric film that is chemically bonded to the substrate to achieve the desired properties in terms abrasion, wear, lubricity and other properties.
    Type: Application
    Filed: July 27, 2020
    Publication date: February 11, 2021
    Inventors: Mike Waleryszak, Paul Thottathil, John M. Ryan, Purushothaman Kesavan, Satyabrata Mukherjee
  • Publication number: 20210017397
    Abstract: Compositions and methods are described which provide a protective coating to coils or springs via a polymerization process such as by covalent bonding that includes grafting to the metal surface.
    Type: Application
    Filed: September 29, 2020
    Publication date: January 21, 2021
    Inventors: Paul Thottathil, John M. Ryan, Purushothaman Kesavan, Satyabrata Mukherjee
  • Patent number: 10793724
    Abstract: Compositions and methods are described which provide a protective coating to coils or springs via a polymerization process such as by covalent bonding that includes grafting to the metal surface.
    Type: Grant
    Filed: November 6, 2018
    Date of Patent: October 6, 2020
    Assignee: Winimac Coil Spring, Inc.
    Inventors: Paul Thottathil, John M. Ryan, Purushothaman Kesavan, Satyabrata Mukherjee
  • Publication number: 20190136071
    Abstract: Compositions and methods are described which provide a protective coating to coils or springs via a polymerization process such as by covalent bonding that includes grafting to the metal surface.
    Type: Application
    Filed: November 6, 2018
    Publication date: May 9, 2019
    Inventors: Paul Thottathil, John M. Ryan, Purushothaman Kesavan, Satyabrata Mukherjee
  • Publication number: 20180362800
    Abstract: This invention, relates to a coating comprising prepolymer and monomers for application onto polyurethane for chemical resistance, abrasion resistance, water proof etc. Usually polyurethane is porous and does not have sufficient stain, abrasion and chemical resistance. The said coatings developed using technology of chemical grafting that involves the use of prepolymers, monomers, catalyst, graft initiator, wetting agents, fillers and other ingredients of the composition. The coating thus obtained when applied on the polyurethane allows obtaining graft polymerization, thereby forming a polymeric film chemically attached to the substrate. The polyurethane substrate is reacted with graft initiator which creates the reaction sites on the substrate via free radical mechanism.
    Type: Application
    Filed: June 16, 2017
    Publication date: December 20, 2018
    Inventors: Terry Cassaday, John Ryan, Paul Thottathil, Purushothaman Kesavan, Satyabrata Mukherjee
  • Patent number: 9951303
    Abstract: This disclosure relates to composition for grafting fragrance substances, as well as related articles, consumer products, and methods.
    Type: Grant
    Filed: March 11, 2013
    Date of Patent: April 24, 2018
    Assignee: Robertet, Inc.
    Inventors: Stephen V. Dente, Ketrin Leka Basile, Julianne Harraka, Garry Johnson, Paul Thottathil, Satyabrata Mukherjee, Purushothaman Kesavan, John Ryan
  • Patent number: 9862835
    Abstract: Provided herein are graft coating formulations for windows that can help reduce or prevent bird strikes via a combination of UV reflectivity and fluorescence. These graft coating formulations may include an acrylic monomer, a diacrylic monomer, a graft initiator, and a catalyst, and when applied to a glass or plastic substrate, may reflect more than about 70% incident light having a wavelength of less than 400 nm, and also may fluoresce when exposed to light having a wavelength of less than about 400 nm. This combination of reflectivity and fluorescence may render the window visible to birds, while still appearing transparent to humans.
    Type: Grant
    Filed: August 5, 2013
    Date of Patent: January 9, 2018
    Assignee: WINDOWALERT, INC.
    Inventors: Paul Thottathil, Purushothaman Kesavan, John Ryan, Satyabrata Mukherjee
  • Patent number: 9845406
    Abstract: This invention relates to a coating comprising prepolymer and monomers for application onto polyurethane for chemical resistance, abrasion resistance, water proof etc. Usually polyurethane is porous and does not have sufficient stain, abrasion and chemical resistance. The said coatings developed using technology of chemical grafting that involves the use of prepolymers, monomers, catalyst, graft initiator, wetting agents, fillers and other ingredients of the composition. The coating thus obtained when applied on the polyurethane allows obtaining graft polymerization, thereby forming a polymeric film chemically attached to the substrate. The polyurethane substrate is reacted with graft initiator which creates the reaction sites on the substrate via free radical mechanism.
    Type: Grant
    Filed: May 9, 2013
    Date of Patent: December 19, 2017
    Inventors: Terry Cassaday, John Ryan, Paul Thottathil, Purushothaman Kesavan, Satyabrata Mukherjee
  • Publication number: 20140335362
    Abstract: This invention relates to a coating comprising prepolymer and monomers for application onto polyurethane for chemical resistance, abrasion resistance, water proof etc. Usually polyurethane is porous and does not have sufficient stain, abrasion and chemical resistance. The said coatings developed using technology of chemical grafting that involves the use of prepolymers, monomers, catalyst, graft initiator, wetting agents, fillers and other ingredients of the composition. The coating thus obtained when applied on the polyurethane allows obtaining graft polymerization, thereby forming a polymeric film chemically attached to the substrate. The polyurethane substrate is reacted with graft initiator which creates the reaction sites on the substrate via free radical mechanism.
    Type: Application
    Filed: May 9, 2013
    Publication date: November 13, 2014
    Inventors: Terry Cassaday, John Ryan, Paul Thottathil, Purushothaman Kesavan, Satyabrata Mukherjee
  • Publication number: 20140090182
    Abstract: This disclosure relates to composition for grafting fragrance substances, as well as related articles, consumer products, and methods.
    Type: Application
    Filed: March 11, 2013
    Publication date: April 3, 2014
    Applicant: Robertet, Inc.
    Inventors: Stephen V. Dente, Ketrin Leka Basile, Julianne Harraka, Garry Johnson, Paul Thottathil, Satyabrata Mukherjee, Purushothaman Kesavan, John Ryan
  • Publication number: 20140037838
    Abstract: Provided herein are graft coating formulations for windows that can help reduce or prevent bird strikes via a combination of UV reflectivity and fluorescence. These graft coating formulations may include an acrylic monomer, a diacrylic monomer, a graft initiator, and a catalyst, and when applied to a glass or plastic substrate, may reflect more than about 70% incident light having a wavelength of less than 400 nm, and also may fluoresce when exposed to light having a wavelength of less than about 400 nm. This combination of reflectivity and fluorescence may render the window visible to birds, while still appearing transparent to humans.
    Type: Application
    Filed: August 5, 2013
    Publication date: February 6, 2014
    Applicant: WindowAlert, Inc.
    Inventors: Paul Thottathil, Purushothaman Kesavan, John Ryan, Satyabrata Mukherjee
  • Patent number: 6630244
    Abstract: A coating formulation for application to surfaces associated with combustion, such as fuel injectors, and surfaces subjected to elevated temperatures, such as fuel supply components, to prevent the deposition at high temperatures of carbon or graphite on such surfaces, such as stainless steel and alloyed steel compositions. The coating formulation forms a thin layer of polymer coating on the surface by chemical grafting involving the use of a graft initiator to create active bonding sites, on the metal surface, for the silicone-based prepolymer to undergo polymerization on the metal surface. The bonding and polymerization are completed in a single application process without using complex equipment. The coating and process helps surfaces associated with combustion and surfaces subjected to elevated temperature reduce carbon or coke formation at temperatures up to 700° F. and thereby improves the durability and performance of those surfaces.
    Type: Grant
    Filed: March 23, 2001
    Date of Patent: October 7, 2003
    Assignee: Delavan Inc.
    Inventors: Chien-Pei Mao, Purushothaman Kesavan, Mohan Sanduja, Paul Thottathil, Carl Horowitz