Patents by Inventor Narayana Iyer

Narayana Iyer 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: 20240092007
    Abstract: Described herein are thermoplastic vulcanizate compositions that include a thermoplastic matrix comprising a cyclic olefin copolymer and an oil and particles dispersed in the thermoplastic matrix and comprising an at least partially cross-linked rubber. The thermoplastic vulcanizate composition has a tan ? profile comprising a peak occurring between about ?20° C. and about 90° C. and having a peak value between about 0.1 and about 2.0.
    Type: Application
    Filed: October 26, 2021
    Publication date: March 21, 2024
    Inventors: Krishnan Anantha Narayana Iyer, Shushuang Li, Anas Mujtaba, Liang Li, Vincent F. Rerat, Yujie Sheng
  • Patent number: 11905401
    Abstract: In an embodiment, a thermoplastic vulcanizate (TPV) composition is provided. The TPV composition includes a thermoplastic polyolefin; and an ethylene based copolymer rubber, wherein the ethylene based copolymer rubber has: a Mw of from 500,000 g/mol to 3,000,000 g/mol, a Mw/Mn of 4.0 or lower, and a g?vis of 0.90 or greater. In another embodiment, a TPV composition includes a thermoplastic phase and an ethylene-propylene-diene terpolymer, wherein the thermoplastic vulcanizate composition has: a hardness of from 20 Shore A to 60 Shore D; and a stress relaxation slope of ?1 to ?5 (l/min) as measured by an Elastocon stress relaxation instrument.
    Type: Grant
    Filed: April 25, 2022
    Date of Patent: February 20, 2024
    Assignee: Celanese International Corporation
    Inventors: Antonios K. Doufas, Krishnan Anantha Narayana Iyer, Eric P Jourdain, Michael J. Goncy, Kelly Kirkendall, Katya N. Reyna
  • Patent number: 11846371
    Abstract: A flexible conduit used for transportation of hydrocarbon fluids for off-shore and on-shore oil and gas applications includes an inner pressure sheath, at least one reinforcing layer at least partially disposed around the pressure sheath, an outer protective sheath at least partially disposed around the at least one reinforcing layer, and optionally a thermally insulating layer disposed between the at least one reinforcing layer and the outer protective sheath. At least one of the inner pressure sheath, outer protective sheath, and the thermally insulating layer is manufactured using a thermoplastic blend (TPB) composition. The TPB compositions disclosed herein are useful for the formation of at least one polymer layer of the thermoplastic umbilical hoses used for transportation of hydrocarbon fluids.
    Type: Grant
    Filed: September 10, 2019
    Date of Patent: December 19, 2023
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Antonios K. Doufas, Krishnan Anantha Narayana Iyer, Michael J. Goncy, Andrew A. Takacs, Wanli Wang
  • Patent number: 11734220
    Abstract: Disclosed are techniques for using firmware and hardware blocks of a device to decode signals encoded by signal edge positioning within a data bit width, such as bi-phase mark space coding (BMC) used for encoding in-band communication of wireless charging systems. The first device may use general purpose I/O (GPIO) interrupts to detect the start of a packet. The firmware may synchronize and configure the clock of a serial peripheral interface (SPI) to oversample the signals. The SPI may store the sampled data into a buffer, freeing the firmware from having to expend processing cycles to detect the transitions of the data in real-time. The firmware may read the buffered samples to decode the packet data in a post-processing stage. The firmware may detect the end of the packet by polling and GPIO interrupts or based on the samples read from the buffer to stop the clock of the SPI.
    Type: Grant
    Filed: February 11, 2022
    Date of Patent: August 22, 2023
    Assignee: Cypress Semiconductor Corporation
    Inventors: Kailas Narayana Iyer, Jeevith Kumar Nagamangala Muninarayanappa
  • Publication number: 20230259480
    Abstract: Disclosed are techniques for using firmware and hardware blocks of a device to decode signals encoded by signal edge positioning within a data bit width, such as bi-phase mark space coding (BMC) used for encoding in-band communication of wireless charging systems. The first device may use general purpose I/O (GPIO) interrupts to detect the start of a packet. The firmware may synchronize and configure the clock of a serial peripheral interface (SPI) to oversample the signals. The SPI may store the sampled data into a buffer, freeing the firmware from having to expend processing cycles to detect the transitions of the data in real-time. The firmware may read the buffered samples to decode the packet data in a post-processing stage. The firmware may detect the end of the packet by polling and GPIO interrupts or based on the samples read from the buffer to stop the clock of the SPI.
    Type: Application
    Filed: February 11, 2022
    Publication date: August 17, 2023
    Applicant: Cypress Semiconductor Corporation
    Inventors: Kailas NARAYANA IYER, Jeevith Kumar NAGAMANGALA MUNINARAYANAPPA
  • Publication number: 20230261494
    Abstract: A Universal Serial Bus (USB)-Power Delivery (PD) integrated circuit (IC) controller is described. The controller includes: a first USB port configured for coupling the USB-PD IC controller to a USB power adaptor; a second port configured for coupling the USB-PD IC controller to a wireless charging station; and logic configured to control a level of a voltage output by the USB power adaptor and to control an output power level of the wireless charging station, wherein an input voltage of the wireless charging station corresponds to the voltage output by the USB power adaptor or is derived from the voltage output by the USB power adaptor. The IC controls both USB-PD and wireless power simultaneously as a system to transmit power and may limit the output power to prevent overload conditions. A corresponding wireless charging system and method of operating the wireless charging system are also described.
    Type: Application
    Filed: February 11, 2022
    Publication date: August 17, 2023
    Inventors: Nicholaus Smith, Kailas Narayana Iyer, Jegannathan Ramanujam, Palaniappan Subbiah
  • Patent number: 11725098
    Abstract: A conduit, particularly flexible conduit comprises an inner tubular housing, at least one reinforcing layer at least partially disposed around the inner housing, an outer protective sheath at least partially disposed around the at least one reinforcing layer, and optionally a thermally insulating layer disposed between the at least one reinforcing layer and the outer protective sheath. At least one of the outer protective sheath and the thermally insulating layer comprises a thermoplastic vulcanizate composition.
    Type: Grant
    Filed: September 14, 2018
    Date of Patent: August 15, 2023
    Assignee: Celanese International Corporation
    Inventors: Andrew Takacs, Declan Noel Whelan, Antonios K. Doufas, Deborah Jean Davis, Robert Leslie Chidlow, Wanli Wang, Krishnan Anantha Narayana Iyer, Krassimir Iordanov Doynov, Xin Chen, Yuan-Ju Chen
  • Publication number: 20230193010
    Abstract: In an embodiment is provided a thermoplastic vulcanizate (TPV) composition that includes a rubber and a thermoplastic polyolefin, the thermoplastic polyolefin comprising a polymethylpentene. In another embodiment is provided a pipe, wherein the pipe includes a TPV composition. In another embodiment is provided an insulated high-temperature transport conduit that includes a TPV composition. In another embodiment is provided a pipe that includes a thermal insulation layer comprising a TPV composition. In another embodiment is provided a process for preparing a TPV composition, the process includes melt processing under shear conditions at least one thermoplastic polyolefin, at least one rubber, and at least one curing agent, the at least one thermoplastic polyolefin comprising polymethylpentene; and forming a TPV composition.
    Type: Application
    Filed: April 26, 2021
    Publication date: June 22, 2023
    Inventors: Krishnan Anantha Narayana Iyer, Dinara Sunagatullina
  • Publication number: 20230183463
    Abstract: Thermoplastic elastomer compositions comprising brominated isobutylene paramethyl-styrene terpolymers, one or more thermoplastic polyolefins, optionally, one or more soft thermoplastic elastomers, and a curing system to form such thermoplastic elastomeric compositions that are suitable for use in pharmaceutical articles.
    Type: Application
    Filed: May 11, 2021
    Publication date: June 15, 2023
    Inventors: Peite Bao, Shane H. Larsen, Wanli Wang, Krishnan Anantha Narayana Iyer, Anas Mujtaba, Jianya Cheng, Sunny Jacob
  • Publication number: 20230133171
    Abstract: A spoolable pipe (100) comprising: a barrier layer (104) formed around a longitudinal axis of the pipe; a reinforcing layer (105) disposed around the barrier layer comprising a fiber material; and an outer layer (110), wherein at least one of the reinforcing layer (105) and the outer layer (110) comprises a thermoplastic elastomer (TPE) composition comprising a thermoplastic matrix and a rubber phase dispersed in the thermoplastic matrix and having a thermal conductivity of about 0.2 W/m-K or less.
    Type: Application
    Filed: March 16, 2021
    Publication date: May 4, 2023
    Inventors: Krishnan Anantha Narayana Iyer, Antonios K. Doufas, Wanli Wang, Warren P. Jones, Deborah J. Davis
  • Publication number: 20220325086
    Abstract: Thermoplastic vulcanizate compositions and articles exhibiting superior elastomeric performance and adhesive properties, and methods of making same are characterized by comprising a thermoplastic phase and a rubber phase. The thermoplastic phase comprises a thermoplastic polyolefin, and the rubber phase comprises an amorphous propylene-ethylene copolymer having: a Mn of from 20 kg/mol to 3,000 kg/mol, a Mw/Mn of 10.0 or lower, an ethylene percentage by weight of from about 2 wt. % to about 50 wt. %, a diene percentage by weight of from about 0 wt. % to about 21 wt. % and a heat of fusion of less than 5 J/g.
    Type: Application
    Filed: August 26, 2020
    Publication date: October 13, 2022
    Inventors: Antonios K. Doufas, Krishnan Anantha Narayana Iyer, Edward J. Blok, Narayanaswami Dharmarajan, Zhifeng Bai, Keishla R. Rivera Dones, Ron Walker, Sudhin Datta
  • Publication number: 20220306849
    Abstract: The present disclosure relates to a thermoplastic vulcanizate including a polypropylene and a copolymer. The copolymer may have an ethylene content, a propylene content, and an a, ?,?-diene content. The thermoplastic vulcanizate has a shore hardness of about 20 Shore A or greater. Alternatively, a thermoplastic vulcanizate may include a polypropylene and an elastomeric polymer and have a shore hardness of about 50 MPa or greater, a tensile strength at yield of about 18 MPa or greater, and an oil swell of about 15% weight gain or less. Additionally, the present disclosure relates to processes for producing thermoplastic vulcanizates. A process may include introducing a catalyst and propylene to a first reactor to form a first polymer, and introducing the first polymer, ethylene, at least one ?,?-diene, and optionally additional propylene to a second reactor to form an impact copolymer. The process may further include crosslinking the impact copolymer.
    Type: Application
    Filed: October 13, 2020
    Publication date: September 29, 2022
    Inventors: Antonios K. Doufas, Krishnan Anantha Narayana Iyer, Zerong Lin, Ranadip Ganguly
  • Publication number: 20220299154
    Abstract: In an embodiment is provided a composition having a thermal conductivity of less than 0.2 W/m-K, the composition including a rubber and a thermoplastic olefin. In another embodiment is provided an insulated high-temperature transport conduit that includes a continuous steel pipe comprising one or more pipe sections, wherein the steel pipe has an outer surface and an inner surface; and a first thermal insulation layer disposed over the outer surface of the steel pipe, wherein the first thermal insulation layer comprises a composition having a thermal conductivity of less than 0.2 W/m-K, the composition comprising a rubber and a thermoplastic olefin.
    Type: Application
    Filed: August 14, 2020
    Publication date: September 22, 2022
    Inventors: Krishnan Anantha Narayana Iyer, Antonios K. Doufas, Anthony J. Dias, Deborah J. Davis, Warren P. Jones, Wanli Wang, Krassimir I. Doynov, Gregory R. Ruschau, Sunny Jacob
  • Publication number: 20220251362
    Abstract: In an embodiment, a thermoplastic vulcanizate (TPV) composition is provided. The TPV composition includes a thermoplastic polyolefin; and an ethylene based copolymer rubber, wherein the ethylene based copolymer rubber has: a Mw of from 500,000 g/mol to 3,000,000 g/mol, a Mw/Mn of 4.0 or lower, and a g?vis of 0.90 or greater. In another embodiment, a TPV composition includes a thermoplastic phase and an ethylene-propylene-diene terpolymer, wherein the thermoplastic vulcanizate composition has: a hardness of from 20 Shore A to 60 Shore D; and a stress relaxation slope of ?1 to ?5 (l/min) as measured by an Elastocon stress relaxation instrument.
    Type: Application
    Filed: April 25, 2022
    Publication date: August 11, 2022
    Inventors: Antonios K. Doufas, Krishnan Anantha Narayana Iyer, Eric P. Jourdain, Michael J. Goncy, Kelly Kirkendall, Katya N. Reyna
  • Publication number: 20220177685
    Abstract: In another embodiment, a TPV composition includes an ethylene based copolymer, a thermoplastic polyolefin, and one or more of an oil or a plasticizer. The ethylene based copolymer has an Mw of from 400,000 g/mol to 3,000,000 g/mol, a Mw/Mn of 10 or less, and a g?vis of 0.7 or more. An amount of the one or more of an oil or a plasticizer in the TPV composition is from 10 parts by weight to 200 parts by weight per 100 parts by weight of the ethylene based copolymer, and the TPV composition has an extrusion surface roughness that is from 50 ?in to 120 ?in. In another embodiment is provided a method of forming a TPV composition. In another embodiment is provided a method of forming an article that includes a TPV composition. In another embodiment is provided an article that includes a TPV composition.
    Type: Application
    Filed: June 19, 2020
    Publication date: June 9, 2022
    Inventors: Krishnan Anantha Narayana Iyer, Antonios K. Doufas, Michael J. Goncy, Eric P. Jourdain
  • Patent number: 11312847
    Abstract: In an embodiment, a thermoplastic vulcanizate (TPV) composition is provided. The TPV composition includes a thermoplastic polyolefin; and an ethylene based copolymer rubber, wherein the ethylene based copolymer rubber has: a Mw of from 500,000 g/mol to 3,000,000 g/mol, a Mw/Mn of 4.0 or lower, and a g?vis of 0.90 or greater. In another embodiment, a TPV composition includes a thermoplastic phase and an ethylene-propylene-diene terpolymer, wherein the thermoplastic vulcanizate composition has: a hardness of from 20 Shore A to 60 Shore D; and a stress relaxation slope of ?1 to ?5 (1/min) as measured by an Elastocon stress relaxation instrument.
    Type: Grant
    Filed: March 29, 2019
    Date of Patent: April 26, 2022
    Assignee: Celanese International Corporation
    Inventors: Antonios K. Doufas, Krishnan Anantha Narayana Iyer, Eric P. Jourdain, Michael J. Goncy, Kelly Kirkendall, Katya N. Reyna
  • Publication number: 20220112362
    Abstract: A flexible pipe for transporting fluids in hydrocarbon production. The flexible pipe includes at least one layer comprised of a thermoplastic vulcanizate (TPV) composition. In one embodiment, the TPV composition further includes a cyclic olefin copolymer present in a range from 0.1 wt % to 30 wt % based upon a total weight of the TPV composition. In another embodiment, the TPV composition further includes a hydrocarbon resin present in a range from 0.1 wt % to 30 wt % based upon a total weight of the TPV composition. In another embodiment, the TPV composition further includes a slip agent present in a range from 0.1 wt % to 30 wt % based upon a total weight of the TPV composition. In another embodiment, the TPV composition further includes a silicon hydride reducing agent compound with at least two Si—H groups. In another embodiment, the TPV composition further includes a polyolefin based compatibilizer. In another embodiment, the TPV composition has an abrasion resistance of 75 mg/1000 cycle or less.
    Type: Application
    Filed: September 9, 2019
    Publication date: April 14, 2022
    Inventors: Krishnan Anantha Narayana Iyer, Antonios K. Doufas, Anthony J. Dias, Andrew A. Takacs
  • Publication number: 20220112364
    Abstract: In an embodiment, a thermoplastic vulcanizate (TPV) composition includes a rubber, a thermoplastic polyolefin, and a polyhedral oligomeric silsesquioxane, wherein: a concentration of the rubber is from 10 wt % to 80 wt % based on a combined weight of the rubber and the thermoplastic polyolefin; a concentration of the thermoplastic polyolefin is from 20 wt % to 90 wt % based on the combined weight of the rubber and the thermoplastic polyolefin; and a concentration of the polyhedral oligomeric silsesquioxane is from 0.1 wt % to 20 wt % based on the total weight of the TPV composition. In another embodiment, a process for preparing a dynamically vulcanized thermoplastic vulcanizate composition includes melt processing under shear conditions at least one thermoplastic resin, at least one rubber, at least one curing agent, and at least one polyhedral oligomeric silsesquioxane; and forming a dynamically vulcanized thermoplastic vulcanizate composition. In another embodiment, a pipe is provided.
    Type: Application
    Filed: March 23, 2020
    Publication date: April 14, 2022
    Inventors: Krishnan Anantha Narayana Iyer, Antonios K. Doufas, Anthony J. Dias
  • Publication number: 20220081528
    Abstract: Foam pellets comprising a thermoplastic vulcanizate (TPV) and thermo-expandable microspheres, the foam pellet having a specific gravity of 0.2 to 1.0 and the TPV being composed of an at least partially vulcanized rubber component and a thermoplastic component. The foam pellets may be subsequently processed to form various foam articles without the need to include a foaming agent during processing.
    Type: Application
    Filed: January 13, 2020
    Publication date: March 17, 2022
    Inventors: Antonios K. Doufas, Hang Dong, Krishnan Anantha Narayana Iyer, Oscar O. Chung, Xin Chen, Michael J. Goncy, John A. Bowers, Kathy B. Cabrera, Porter C. Shannon, Christopher S. Breiner
  • Publication number: 20210356056
    Abstract: A flexible conduit used for transportation of hydrocarbon fluids for off-shore and on-shore oil and gas applications includes an inner pressure sheath, at least one reinforcing layer at least partially disposed around the pressure sheath, an outer protective sheath at least partially disposed around the at least one reinforcing layer, and optionally a thermally insulating layer disposed between the at least one reinforcing layer and the outer protective sheath. At least one of the inner pressure sheath, outer protective sheath, and the thermally insulating layer is manufactured using a thermoplastic blend (TPB) composition. The TPB compositions disclosed herein are useful for the formation of at least one polymer layer of the thermoplastic umbilical hoses used for transportation of hydrocarbon fluids.
    Type: Application
    Filed: September 10, 2019
    Publication date: November 18, 2021
    Inventors: Antonios K. Doufas, Krishnan Anantha Narayana Iyer, Michael J. Goncy, Andrew A. Takacs, Wanli Wang