Patents by Inventor Gaurav Agrawal

Gaurav Agrawal 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: 20190247499
    Abstract: In alternative embodiments, the invention provides a “triple combination” therapy for treating, ameliorating and preventing Crohn's Disease (or Crohn syndrome, terminal or distal ileitis or regional enteritis) or related disorders and conditions in mammals, such as paratuberculosis in mammals, or Johne's disease, including genetically-predisposed and chronic disorders, where the microbial or bacterial flora of the bowel is at least one causative or symptom-producing factor; and compositions for practicing same. In alternative embodiments, methods and compositions of the invention comprise or comprise use of therapies, medications, formulations and pharmaceuticals comprising active agents that can suppress or eradicate the microbiota super-infection that causes Crohn's Disease or paratuberculosis infection in mammals.
    Type: Application
    Filed: April 23, 2019
    Publication date: August 15, 2019
    Inventor: Gaurav AGRAWAL
  • Patent number: 10376578
    Abstract: In alternative embodiments, the invention provides a “triple combination” therapy for treating, ameliorating and preventing Crohn's Disease (or Crohn syndrome, terminal or distal ileitis or regional enteritis) or related disorders and conditions in mammals, such as paratuberculosis in mammals, or Johne's disease, including genetically-predisposed and chronic disorders, where the microbial or bacterial flora of the bowel is at least one causative or symptom-producing factor; and compositions for practicing same. In alternative embodiments, methods and compositions of the invention comprise or comprise use of therapies, medications, formulations and pharmaceuticals comprising active agents that can suppress or eradicate the microbiota super-infection that causes Crohn's Disease or paratuberculosis infection in mammals.
    Type: Grant
    Filed: April 10, 2017
    Date of Patent: August 13, 2019
    Inventor: Gaurav Agrawal
  • Patent number: 10351489
    Abstract: Disclosed is a process for recovering paraxylene in which a first simulated moving bed adsorption unit is used to produce two extract streams—one rich in paraxylene and a paraxylene-rich extract stream that is lean in ethylbenzene and an ethylbenzene-rich extract stream that is lean in paraxylene- and a paraxylene-depleted raffinate stream. A significant amount of the ethylbenzene is removed in the ethylbenzene-rich extract stream (at least enough to limit buildup in the isomerization loop), so the paraxylene-depleted raffinate stream may be isomerized in the liquid phase. Avoiding vapor phase isomerization saves energy and capital, as liquid phase isomerization requires less energy and capital than the vapor phase isomerization process due to the requirement of vaporizing the paraxylene-depleted stream and the use of hydrogen, which requires an energy and capital intensive hydrogen recycle loop.
    Type: Grant
    Filed: May 19, 2017
    Date of Patent: July 16, 2019
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Michael Salciccioli, Gaurav Agrawal, Michael W. Weber, Dana L. Pilliod, Catherine M. Dorsi
  • Publication number: 20190211254
    Abstract: A method of breaking the viscosity of a treatment fluid comprises: adding hydrophobic nanoparticles to a treatment fluid comprising a base fluid and a viscoelastic surfactant gelling agent, the hydrophobic nanoparticles comprising metallic nanoparticles that are surface modified with C6-30 aliphatic groups, wherein the hydrophobic nanoparticles are added in an amount effective to decrease the viscosity of the treatment fluid as compared to a treatment fluid absent the hydrophobic nanoparticles.
    Type: Application
    Filed: March 20, 2019
    Publication date: July 11, 2019
    Applicant: Baker Hughes, a GE company, LLC
    Inventors: Shiv Shankar Sangaru, Prahlad Yadav, Tianping Huang, Gaurav Agrawal, Pranjal Sarmah
  • Patent number: 10344222
    Abstract: A hydrocarbon conversion process comprises providing a hydrocarbon feedstock comprising an effluent fraction from a pyrolysis process, wherein the effluent fraction has an initial boiling point at atmospheric pressure of at least 177° C. and a final boiling point at atmospheric pressure of no more than 343° C. and comprises at least 0.5 wt. % of olefinic hydrogen atoms based on the total weight of hydrogen atoms in the effluent fraction. The hydrocarbon feedstock is hydroprocessed in at least one hydroprocessing zone in the presence of treatment gas comprising molecular hydrogen under catalytic hydroprocessing conditions to produce a hydroprocessed product comprising less than 0.5 wt. % of olefinic hydrogen atoms based on the total weight of hydrogen atoms in the hydroprocessed product. The hydroprocessing conditions comprise a temperature from 150 to 350° C. and a pressure from 500 to 1500 psig (3550 to 10445 kPa-a).
    Type: Grant
    Filed: May 4, 2018
    Date of Patent: July 9, 2019
    Assignee: ExonMobil Chemical Patents Inc.
    Inventors: Gaurav Agrawal, Stephen T. Cohn, Kapil Kandel, Subramanya V. Nayak, Teng Xu
  • Publication number: 20190184311
    Abstract: The process involves the use of two rotary valves to implement Varicol operation of a simulated moving bed apparatus to separate a product from at least one multicomponent feed. In a particular embodiment, paraxylene is separated from a mixture of C8 aromatic hydrocarbons. The use of the Varicol process further enhances the separation of the desired product and provides flexibility with a simulated moving bed apparatus using dual rotary valves.
    Type: Application
    Filed: February 9, 2017
    Publication date: June 20, 2019
    Inventors: Michael W. WEBER, Siwei GUO, Yoshiaki KAWAJIRI, Jason BENTLEY, Gaurav AGRAWAL, Michael SALCICCIOLI, Dana L. PILLIOD
  • Publication number: 20190185394
    Abstract: A process to separate paraxylene from a mixture of paraxylene, metaxylene, orthoxylene, and ethylbenzene in a commercial simulated moving bed apparatus in a reduced number of beds is provided, allowing an additional separation to be conducted in the remaining beds. This additional separation may separate another xylene isomer, ethylbenzene, or a non-aromatic C8+ hydrocarbon from the raffinate stream produced by the first separation. A PowerFeed process is used to recover paraxylene in a first adsorption zone containing 8-16 beds of a conventional 24-bed simulated moving bed adsorption apparatus, and then a second separation may be conducted in a second adsorption zone containing the remaining beds.
    Type: Application
    Filed: May 17, 2017
    Publication date: June 20, 2019
    Inventors: Michael W. WEBER, Yoshiaki KAWAJIRI, Michael SALCICCIOLI, John R. PORTER, Gaurav AGRAWAL, Dana L. PILLIOD, Siwei GUO, Jason BENTLEY
  • Patent number: 10323463
    Abstract: Methods of making cutting elements for earth-boring tools may involve placing a powdered mixture into a mold. The powdered mixture may include a plurality of core particles comprising a diamond material and having an average diameter of between 1 ?m and 500 ?m, a coating material adhered to and covering at least a portion of an outer surface of each core particle of the plurality of core particles, the coating material comprising an amine terminated group, and a plurality of nanoparticles selected from the group consisting of carbon nanotubes, nanographite, nanographene, non-diamond carbon allotropes, surface modified nanodiamond, nanoscale particles of BeO, and nanoscale particles comprising a Group VIIIA element adhered to the coating material. The powdered mixture may be sintered to form a polycrystalline diamond table. The polycrystalline diamond table may be attached to a substrate.
    Type: Grant
    Filed: March 22, 2017
    Date of Patent: June 18, 2019
    Assignee: Baker Hughes Incorporated
    Inventors: Soma Chakraborty, Oleksandr V. Kuznetsov, Gaurav Agrawal
  • Patent number: 10316415
    Abstract: A corrosion inhibitor for use in aqueous fluids, e.g. brine, which contact a metal surface, contains a blend or cross-linked reaction product of a main chain type polybenzoxazine (MCTPB) and a chitosan component selected from the group consisting of chitosan, chitosan glycol, and combinations thereof. The MCTPB can be made by reacting formaldehyde, bisphenol A, and tetraethylenepentamine (TEPA). The corrosion inhibitor may contain a small amount of an inorganic acid and/or an organic acid.
    Type: Grant
    Filed: August 24, 2016
    Date of Patent: June 11, 2019
    Assignee: Baker Hughes, a GE company, LLC
    Inventors: Taher Bakr Hafiz, Abdulaziz Abdulrhman Almathami, Gaurav Agrawal, Manuel Hoegerl
  • Patent number: 10300404
    Abstract: Disclosed herein are processes for recovering paraxylene in which a first simulated moving bed adsorption unit is used to produce a paraxylene-rich extract stream that also contains a significant amount of the ethylbenzene and a paraxylene-depleted raffinate stream. Because a significant amount of the ethylbenzene is removed in the paraxylene-rich extract stream (at least enough to limit buildup in the isomerization loop), the paraxylene-depleted raffinate stream may be isomerized in the liquid phase. Avoiding vapor phase isomerization saves energy and capital, as liquid phase isomerization requires less energy and capital than the vapor phase isomerization process due to the requirement of vaporizing the paraxylene-depleted stream and the use of hydrogen, which requires an energy- and capital-intensive hydrogen recycle loop.
    Type: Grant
    Filed: May 19, 2017
    Date of Patent: May 28, 2019
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Catherine M. Dorsi, Gaurav Agrawal, Michael W. Weber, Dana L. Pilliod, John R. Porter
  • Patent number: 10280361
    Abstract: A method of breaking the viscosity of a treatment fluid comprises: adding hydrophobic nanoparticles to a treatment fluid comprising a base fluid and a viscoelastic surfactant gelling agent, the hydrophobic nanoparticles comprising metallic nanoparticles that are surface modified with C6-30 aliphatic groups, wherein the hydrophobic nanoparticles are added in an amount effective to decrease the viscosity of the treatment fluid as compared to a treatment fluid absent the hydrophobic nanoparticles.
    Type: Grant
    Filed: June 20, 2016
    Date of Patent: May 7, 2019
    Assignee: BAKER HUGHES, A GE COMPANY, LLC
    Inventors: Shiv Shankar Sangaru, Prahlad Yadav, Tianping Huang, Gaurav Agrawal, Pranjal Sarmah
  • Patent number: 10263627
    Abstract: A delay-locked loop (DLL) includes a delay line configured to receive a reference clock signal and a control signal, and generate a first plurality of clock signals. Each clock signal of the first plurality is configured to have a different phase delay relative to the reference clock signal. A phase frequency detector is coupled to the delay circuit and is configured to receive a first clock signal and a second clock signal of the first plurality, and generate up and down control signals. A charge pump is coupled to receive the up and down control signals and generates a charge pump current based on the up and down control signals. An output of the charge pump is coupled to the delay line at a voltage control node. An initialization circuit is coupled to the voltage control node and is configured to generate an initialization voltage based on the reference clock signal frequency.
    Type: Grant
    Filed: December 12, 2017
    Date of Patent: April 16, 2019
    Assignee: NXP USA, INC.
    Inventors: Deependra Jain, Krishna Thakur, Gaurav Agrawal
  • Patent number: 10227850
    Abstract: Flow control devices for regulating fluid flow from a subterranean formation by utilizing materials containing hydrophilic surfaces in a flow path of formation fluids. The flow control device comprises a tubular body, a flow path, and a material having a hydrophilic surface disposed within the flow path to restrict the flow of water. Methods of making and systems utilizing the flow control devices are disclosed.
    Type: Grant
    Filed: June 11, 2014
    Date of Patent: March 12, 2019
    Assignee: Baker Hughes Incorporated
    Inventors: Devesh K. Agrawal, Anil K. Sadana, Gaurav Agrawal
  • Patent number: 10227522
    Abstract: A method of treating a subterranean formation penetrated by a well comprises combining an aqueous base fluid, a viscoelastic surfactant gelling agent, two or more types of the following nanoparticles: an alkaline earth metal oxide; an alkaline earth metal hydroxide; a transition metal oxide; or a transition metal hydroxide to form a treatment fluid, and pumping the treatment fluid into the well, wherein the weight ratio of the two or more types of the nanoparticles is selected such that the treatment fluid has an improved fluid efficiency as compared to an otherwise identical reference fluid except for comprising only one type of the nanoparticles selected from an alkaline earth metal oxide; an alkaline earth metal hydroxide; a transition metal oxide; and a transition metal hydroxide.
    Type: Grant
    Filed: May 25, 2016
    Date of Patent: March 12, 2019
    Assignee: BAKER HUGHES, A GE COMPANY, LLC
    Inventors: Shiv Shankar Sangaru, Prahlad Yadav, Tianping Huang, Gaurav Agrawal, Mohammed Al-Rabah
  • Patent number: 10167674
    Abstract: Method of fabricating polycrystalline diamond include functionalizing surfaces of diamond nanoparticles with fluorine, combining the functionalized diamond nanoparticles with a polymer to form a mixture, and subjecting the mixture to high pressure and high temperature (HPHT) conditions to form inter-granular bonds between the diamond nanoparticles. A green body includes a plurality of diamond nanoparticles functionalized with fluorine, and a polymer material interspersed with the plurality of diamond nanoparticles. A method of forming cutting element includes functionalizing surfaces of diamond nanoparticles with fluorine, and combining the functionalized diamond nanoparticles with a polymer to form a mixture. The mixture is formed over a body, and the mixture and the body are subjected to HPHT conditions to form inter-granular bonds between the diamond nanoparticles and secure the bonded diamond nanoparticles to the body.
    Type: Grant
    Filed: March 1, 2013
    Date of Patent: January 1, 2019
    Assignee: BAKER HUGHES INCORPORATED
    Inventors: Valery N. Khabashesku, Anthony A. DiGiovanni, Gaurav Agrawal
  • Publication number: 20180340393
    Abstract: A seal including a fluid resistive cover, a structured element disposed at an inside surface of the cover and drawable with the cover between a first position and a second position.
    Type: Application
    Filed: May 26, 2017
    Publication date: November 29, 2018
    Applicant: Baker Hughes Incorporated
    Inventors: Naeem-Ur-Rehman Minhas, Gaurav Agrawal, Asok Janardhanan Nair
  • Patent number: 10138165
    Abstract: A formulation for use as a lost circulation preventive material is a cement-forming aqueous fluid comprising water, at least one viscoelastic surfactant (VES), at least one monovalent or multivalent salt, at least one magnesium powder, and at least one retarder. The formulation is used in a method of drilling into a subterranean formation that includes introducing into a wellbore passing at least partially through the subterranean formation the cement-forming aqueous fluid, and further increasing the viscosity of the aqueous fluid by the action of the VES forming elongated micelles; where the at least one monovalent salt is present in an amount effective to pseudo-crosslink the elongated VES micelles to further increase the viscosity of the aqueous fluid. The formulation further forms a cement by reacting the at least one magnesium powder and the water which reaction is retarded by the retarder. The water may be saline water.
    Type: Grant
    Filed: March 29, 2017
    Date of Patent: November 27, 2018
    Assignee: Baker Hughes, a GE company, LLC
    Inventors: Pranjal Sarmah, Prahlad Kumar Yadav, Gaurav Agrawal, Tianping Huang
  • Publication number: 20180334622
    Abstract: A hydrocarbon conversion process comprises providing a hydrocarbon feedstock comprising an effluent fraction from a pyrolysis process, wherein the effluent fraction has an initial boiling point at atmospheric pressure of at least 177° C. and a final boiling point at atmospheric pressure of no more than 343° C. and comprises at least 0.5 wt. % of olefinic hydrogen atoms based on the total weight of hydrogen atoms in the effluent fraction. The hydrocarbon feedstock is hydroprocessed in at least one hydroprocessing zone in the presence of treatment gas comprising molecular hydrogen under catalytic hydroprocessing conditions to produce a hydroprocessed product comprising less than 0.5 wt. % of olefinic hydrogen atoms based on the total weight of hydrogen atoms in the hydroprocessed product. The hydroprocessing conditions comprise a temperature from 150 to 350° C. and a pressure from 500 to 1500 psig (3550 to 10445 kPa-a).
    Type: Application
    Filed: May 4, 2018
    Publication date: November 22, 2018
    Inventors: Gaurav Agrawal, Stephen T. Cohn, Kapil Kandel, Subramanya V. Nayak, Teng Xu
  • Publication number: 20180320496
    Abstract: A method of extracting hydrocarbons from a subterranean formation comprises forming a suspension comprising reactive particles and a carrier fluid. The suspension is introduced into a subterranean formation containing a hydrocarbon material. At least a portion of the reactive particles are exothermically reacted with at least one other material within the subterranean formation to form a treated hydrocarbon material from the hydrocarbon material. The treated hydrocarbon material is extracted from the subterranean formation. An additional method of extracting hydrocarbons from a subterranean formation, and a method of treating a hydrocarbon material within a subterranean formation are also described.
    Type: Application
    Filed: July 17, 2018
    Publication date: November 8, 2018
    Inventors: Oleg A. Mazyar, Valery N. Khabashesku, Oleksandr V. Kuznetsov, Gaurav Agrawal, Michael H. Johnson
  • Patent number: 10066441
    Abstract: Methods of fabricating polycrystalline diamond include subjecting a particle mixture to high pressure and high temperature (HPHT) conditions to form inter-granular diamond-to-diamond bonds. Before being subjected to HPHT conditions, the particle mixture includes a plurality of non-diamond nanoparticles, diamond nanoparticles, and diamond grit. The non-diamond nanoparticles includes carbon-free cores and at least one functional group attached to the cores. Cutting elements for use in an earth-boring tool include a polycrystalline diamond material formed by such processes. Earth-boring tools include such cutting elements.
    Type: Grant
    Filed: November 3, 2016
    Date of Patent: September 4, 2018
    Assignee: Baker Hughes Incorporated
    Inventors: Soma Chakraborty, Anthony A. DiGiovanni, Gaurav Agrawal