Patents by Inventor Keshav S. Gautam

Keshav S. Gautam 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: 11905405
    Abstract: Described herein are polymer compositions including at least one semi-crystalline, semi-aromatic polyester polymer and at least one impact modifier. The blends have excellent impact resistance and excellent dimensional stability. The blends also have excellent chemical resistance, whiteness, colorability and anodization resistance. The polymer compositions can optionally include at least one amorphous polymer. The at least one amorphous polymer can be an amorphous polycarbonate polymer or an amorphous polyester polymer or a polyester-carbonate. In some embodiments, the polymer composition can optionally include one or more additives. The polyester compositions described herein can be desirably incorporated into mobile electronic device components.
    Type: Grant
    Filed: January 26, 2022
    Date of Patent: February 20, 2024
    Assignee: SOLVAY SPECIALTY POLYMERS USA, LLC
    Inventors: Mohammad Jamal El-Hibri, Keshav S. Gautam
  • Publication number: 20240026083
    Abstract: The invention relates to a poly(aryl ether sulfone) (PAES) copolymer (P2) with ionically and/or covalently attached bioactive compound(s), articles comprising (P2), methods of making (P2), and methods for making articles such as membranes comprising (P2). Functionalized side-chain PAES copolymers (P1) permit the immobilization of a bioactive compound on copolymer's functionalized side chains for preparing bioactive articles. In particular, an antithrombotic agent such as heparin may be immobilized to form a bioactive membrane structure suitable for hemodialysis to avoid or eliminate the injection of such antithrombotic agent to a patient undergoing hemodialysis. Preferred embodiments include heparinized PAES copolymers and membranes comprising them.
    Type: Application
    Filed: February 9, 2022
    Publication date: January 25, 2024
    Inventors: Kamlesh P. NAIR, Goliver DeJESUS, Theodore MOORE, Emanuele DI NICOLO', Keshav S. GAUTAM
  • Publication number: 20230399468
    Abstract: A bio-based poly(arylether sulfone) copolymer (“copolymer b-PAES”) comprises at least two sulfone recurring units derived from two distinct dihydroxy/diol monomers: a bio-compatible and bio-based diol momoner and a bisphenol monomer distinct from Bisphenol S (BPS) and Bisphenol A (BPA). The dihydroxy bisphenol monomer comprises a substituted-phenol bisphenolic compound distinct from BPS and BPA, preferably comprises a bisphenol F derivative with both alkyl substituted-phenol groups. The bio-based diol monomer comprises at least one diol selected from isosorbide, isomannide and/or isoidide. The copolymer b-PAES is preferably free of BPA and BPS. A process for manufacturing such copolymer b-PAES, its use for manufacturing an article, an article made therefrom such as membranes, and a polymer solution for manufacture of membrane comprising such copolymer b-PAES.
    Type: Application
    Filed: December 10, 2021
    Publication date: December 14, 2023
    Inventors: Atul BHATNAGAR, Keshav S. GAUTAM
  • Patent number: 11441028
    Abstract: Described herein are polymer compositions including (i) a polymer blend containing an amorphous polyester copolymer and a semi-crystalline polyamide polymer (“polyester/polyamide blend”), (ii) 1 weight percent (wt. %) to 5 wt. % of an epoxy functionalized impact modifier and optionally (iii) one or more additives. It was surprisingly found that incorporation of a specific amount of an epoxy functionalized impact modifier into polymer compositions including a polyester/polyamide blend provided for significantly improved impact performance, relative to corresponding polymer compositions incorporating non-epoxy functionalized impact modifiers or corresponding polymer compositions free of impact modifiers. Due at least in part to the significantly improved impact performance and outstanding chemical resistance, the polymer compositions described herein can be incorporated in a wide variety of application settings, including but not limited to mobile electronic application settings.
    Type: Grant
    Filed: April 26, 2018
    Date of Patent: September 13, 2022
    Assignee: SOLVAY SPECIALTY POLYMERS USA, LLC
    Inventors: David McIlroy, Keshav S. Gautam, Raleigh L. Davis
  • Patent number: 11365315
    Abstract: Described herein are polyamide polymer blends including a sulfonated polyamide polymer, an aromatic polyamide polymer and a reinforcing filler. Optionally, the polyamide polymer blend includes an additive. It was surprisingly discovered that blends including a sulfonated polyamide polymer in addition to an aromatic polyamide polymer had increased mechanical performance, relative to corresponding polyamide polymer blends having a non-sulfonated polyamide polymer. Furthermore, it was also surprisingly discovered that, when the sulfonated polyamide polymer included a sodium counter-ion, the mechanical performance of the polyamide polymer blend was further enhanced, relative to corresponding polyamide polymer blends having a sulfonated polyamide polymer including a lithium counter-ion in place of a sodium counter-ion.
    Type: Grant
    Filed: October 10, 2018
    Date of Patent: June 21, 2022
    Assignee: SOLVAY SPECIALTY POLYMERS USA, LLC
    Inventors: Raleigh L. Davis, Keshav S. Gautam, Stéphane Jeol
  • Publication number: 20220145070
    Abstract: Described herein are polymer compositions including at least one semi-crystalline, semi-aromatic polyester polymer and at least one impact modifier. The blends have excellent impact resistance and excellent dimensional stability. The blends also have excellent chemical resistance, whiteness, colorability and anodization resistance. The polymer compositions can optionally include at least one amorphous polymer. The at least one amorphous polymer can be an amorphous polycarbonate polymer or an amorphous polyester polymer or a polyester-carbonate. In some embodiments, the polymer composition can optionally include one or more additives. The polyester compositions described herein can be desirably incorporated into mobile electronic device components.
    Type: Application
    Filed: January 26, 2022
    Publication date: May 12, 2022
    Inventors: Mohammad Jamal EL-HIBRI, Keshav S. GAUTAM
  • Publication number: 20220118464
    Abstract: The invention pertains to a process for separating mixtures of solids based on their densities. The present invention also relates to the use of a separating liquid (L) for separating plastic solids from metal-containing solids based on their densities, wherein the separating liquid (L) has a density d3 such that 1.5<d3<2.0; wherein the solids have a particle size ranging from 0.1 to 100 mm. The separating liquid (L) is preferably a fluorinated fluid.
    Type: Application
    Filed: January 31, 2020
    Publication date: April 21, 2022
    Inventors: Matthew BOOHER, Joel POLLINO, Keshav S. GAUTAM
  • Patent number: 11180648
    Abstract: The invention pertains to a fluoropolymer composition based on a combination of a thermoplastic fluoropolymer and a fluorinated thermoplastic elastomer, possessing improved impact resistance and outstanding flammability behaviour, to a method of making the same, and to a method of manufacturing shaped parts using the same, and to a method of manufacturing a mobile electronic device using said parts.
    Type: Grant
    Filed: March 13, 2018
    Date of Patent: November 23, 2021
    Assignee: SOLVAY SPECIALTY POLYMERS ITALY S.P.A.
    Inventors: David McIlroy, Keshav S. Gautam, Satchit Srinivasan
  • Publication number: 20210269909
    Abstract: The invention pertains to a article or a part, comprising: —a first layer (1) of a composition (C) comprising a polymeric component comprising a) at least one poly(aryl ether ketone) polymer (PAEK), and b) at least one poly(aryl ether sulfone) polymer (PAES), wherein the composition (C) further comprises glass fibers and/or carbon fibers and has a melting temperature (Tm) of at least 290° C., as measured by differential scanning calorimetry (DSC) according to ASTM D3418, and—at least one coating (2) of metal having a thickness of at least 20 ?m, preferably at least 30 ?m. The present invention also relates to a process for preparing this article/part by metallisation and to the use of such articles and parts in electrical & electronic applications, mobile electronics, smart devices & wearables and smart phones.
    Type: Application
    Filed: July 9, 2019
    Publication date: September 2, 2021
    Inventors: Vijay GOPALAKRISHNAN, Imani B. JONES, Mohammad Jamal EL-HIBRI, Keshav S. GAUTAM
  • Patent number: 11015022
    Abstract: The present disclosure relates to a polyamide comprising at least one repeating unit of formula I: —[OC—Ar—O—P(?O)(—Ar)—O—Ar—CO—NH—R—NH]— Formula (I) wherein, Ar is independently selected from the group consisting of aryl, arylene, heteroaryl and carbocyclic group; R represents a covalent bond or a divalent hydrocarbon-based group selected from the group consisting of saturated or unsaturated aliphatics, saturated or unsaturated cycloaliphatics, aromatics, arylaliphatics, and alkylaromatics.
    Type: Grant
    Filed: October 13, 2017
    Date of Patent: May 25, 2021
    Assignee: Performance Polyamides, SAS
    Inventors: Gururajan Padmanaban, Kaustav Chakraborty, Mayuri Shaiwale, Imani B. Jones, Keshav S. Gautam
  • Publication number: 20210087361
    Abstract: Described herein are aliphatic polyamide compositions including an aliphatic polyamide, glass fiber and, optionally, one or more additives. It was surprisingly found that aliphatic polyamide compositions containing specifically selected glass fibers had similar dielectric performance, and significantly improved mechanical performance, relative to corresponding aliphatic polyamide compositions containing low dielectric glass fiber. At least partially due to the high dielectric performance (low dielectric constant) and significantly improved mechanical performance, the aliphatic polyamide compositions can be advantageously incorporated into mobile electronic device components.
    Type: Application
    Filed: April 9, 2018
    Publication date: March 25, 2021
    Inventors: Raleigh L. DAVIS, Keshav S. GAUTAM, Karen PHILLIPS
  • Publication number: 20200247992
    Abstract: Described herein are polyamide polymer blends including a sulfonated polyamide polymer, an aromatic polyamide polymer and a reinforcing filler. Optionally, the polyamide polymer blend includes an additive. It was surprisingly discovered that blends including a sulfonated polyamide polymer in addition to an aromatic polyamide polymer had increased mechanical performance, relative to corresponding polyamide polymer blends having a non-sulfonated polyamide polymer. Furthermore, it was also surprisingly discovered that, when the sulfonated polyamide polymer included a sodium counter-ion, the mechanical performance of the polyamide polymer blend was further enhanced, relative to corresponding polyamide polymer blends having a sulfonated polyamide polymer including a lithium counter-ion in place of a sodium counter-ion.
    Type: Application
    Filed: October 10, 2018
    Publication date: August 6, 2020
    Inventors: Raleigh L. DAVIS, Keshav S. GAUTAM, Stéphane JEOL
  • Publication number: 20200231784
    Abstract: Described herein are reinforced thermoplastic polymer compositions including a flat, low-dielectric glass (“D-glass”) fiber. D-glass fiber compositions with a flat morphology provide for polymer compositions having significantly reduced shrinkage and excellent mechanical and dielectric performance. While the flat D-glass fibers can be desirably incorporated into polyester polymers, poly(aryl ether sulfone) polymers, poly(aryl ether ketone) polymers and a polyphenylene sulfide polymers.
    Type: Application
    Filed: August 2, 2017
    Publication date: July 23, 2020
    Inventors: Raleigh L. DAVIS, Keshav S. GAUTAM
  • Publication number: 20200095415
    Abstract: The invention pertains to a fluoropolymer composition based on a thermoplastic vinylidene fluoride (VDF) polymer and a thermoplastic fluorinated elastomer, possessing advantageous performances, including improved compromise between flexibility and stiffness, and suitable for being notably used in the manufacture of parts and accessories of mobile electronic devices, to a method of making the said composition, and to a method of manufacturing said parts from said composition and mobile electronic devices using said parts.
    Type: Application
    Filed: March 13, 2018
    Publication date: March 26, 2020
    Inventors: David McILROY, Keshav S. GAUTAM, Satchit SRINIVASAN
  • Publication number: 20200095413
    Abstract: The invention pertains to a fluoropolymer composition based on a combination of a thermoplastic fluoropolymer and a fluorinated thermoplastic elastomer, possessing improved impact resistance and outstanding flammability behaviour, to a method of making the same, and to a method of manufacturing shaped parts using the same, and to a method of manufacturing a mobile electronic device using said parts.
    Type: Application
    Filed: March 13, 2018
    Publication date: March 26, 2020
    Inventors: David McILROY, Keshav S. GAUTAM, Satchit SRINIVASAN
  • Publication number: 20200062955
    Abstract: Described herein are polymer compositions including (i) a polymer blend containing an amorphous polyester copolymer and a semi-crystalline polyamide polymer (“polyester/polyamide blend”), (ii) 1 weight percent (wt. %) to 5 wt. % of an epoxy functionalized impact modifier and optionally (iii) one or more additives. It was surprisingly found that incorporation of a specific amount of an epoxy functionalized impact modifier into polymer compositions including a polyester/polyamide blend provided for significantly improved impact performance, relative to corresponding polymer compositions incorporating non-epoxy functionalized impact modifiers or corresponding polymer compositions free of impact modifiers. Due at least in part to the significantly improved impact performance and outstanding chemical resistance, the polymer compositions described herein can be incorporated in a wide variety of application settings, including but not limited to mobile electronic application settings.
    Type: Application
    Filed: April 26, 2018
    Publication date: February 27, 2020
    Inventors: David McILROY, Keshav S. GAUTAM, Raleigh L. DAVIS, Sr.
  • Publication number: 20190256656
    Abstract: The present disclosure relates to a polyamide comprising at least one repeating unit of formula I: —[OC—Ar—O—P(=0)(—Ar)—O—Ar—CO—NH—R—NH]— Formula (I) wherein, Ar is independently selected from the group consisting of aryl, arylene, heteroaryl and carbocyclic group; R represents a covalent bond or a divalent hydrocarbon-based group selected from the group consisting of saturated or unsaturated aliphatics, saturated or unsaturated cycloaliphatics, aromatics, arylaliphatics, and alkylaromatics.
    Type: Application
    Filed: October 13, 2017
    Publication date: August 22, 2019
    Applicants: RHODIA OPERATIONS, SOLVAY SPECIALTY POLYMERS USA, L.L.C.
    Inventors: Gururajan Padmanaban, Kaustav Chakraborty, Mayuri Shaiwale, Imani B. Jones, Keshav S. Gautam
  • Publication number: 20180340065
    Abstract: Described herein are polymerblends having improved impact performance and outstanding chemical resistance. The polymerblends include at least one semi-aromatic polyester polymer, at least one poly(phenyl sulfone) polymer, and at least one impact modifier. In some embodiments, the polymerblends can optionally include one or more aromatic polycarbonate polymers, one or more poly(aryl ether sulfone) polymers and one or more additives. In some embodiments, the polymerblends can be desirably incorporated mobile electronic device components.
    Type: Application
    Filed: August 29, 2016
    Publication date: November 29, 2018
    Applicant: SOLVAY SPECIALTY POLYMERS USA, L.L.C.
    Inventors: Mohammad Jamal EL-HIBRI, Keshav S. GAUTAM
  • Publication number: 20180244846
    Abstract: Described herein are poly(aryl ether) (“PAE”) adhesive compositions including at least one PAE chelating agent. The PAE chelating agent is a PAE polymer. In some embodiments, the PAE adhesive composition can optionally include one or more poly(aryl ether ketone) polymers distinct from the PAE chelating agent. The PAE adhesive composition can be incorporated into polymer-metal junctions to improve the strength thereof. In some such embodiments, the adhesive composition can be disposed between a portion of the plastic component and a portion of the metal component of the polymer-metal junction. In some embodiments, the PAE adhesive compositions can be used in conjunction with one or more adhesion promoters distinct from the PAE adhesive composition. In some embodiments, polymer-metal junctions including the PAE chelating agent can be desirably incorporated in mobile electronic device components.
    Type: Application
    Filed: September 6, 2016
    Publication date: August 30, 2018
    Inventors: John Scott FLANAGAN, Chuck HOPIN, Robert CRISLER, Eugenia NARH, William W. Walter LOONEY, Keshav S. GAUTAM, Mohammad Jamal EL-HIBRI
  • Patent number: 9085894
    Abstract: A laminated structure comprises a first external layer and a second external layer; an internal layer disposed between the first and the second external layers; a first adhesive layer disposed between the first external layer and the internal layer, wherein the first adhesive layer is patterned to cover only a first portion of the internal layer; and a second adhesive layer disposed between the second external layer and the internal layer, wherein the second adhesive layer is patterned to cover only a second portion of the internal layer on a side opposite the first adhesive layer, and wherein the first portion is different than the second portion.
    Type: Grant
    Filed: October 24, 2013
    Date of Patent: July 21, 2015
    Assignee: Georgia-Pacific Gypsum LLC
    Inventors: Douglas C. Eckman, Vincent B. Thomas, Keshav S. Gautam