Patents by Inventor Deborah Jayne Harris

Deborah Jayne Harris 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: 11980869
    Abstract: This invention relates to an aqueous dispersion of particles, the dispersion having a particle content of 10-70 wt %, and the particles comprising, on an oxide basis: (a) 10-98 wt % in total of ZrO2+HfO2, and (b) 2-90 wt % in total of Al2O3, CeO2, La2O3, Nd2O3, Pr6O11, Y2O3, or a transition metal oxide, wherein the dispersion has a Z-average particle size of 100-350 nm and the particles have a crystallite size of 1-9 nm. The invention also relates to a substrate coated with the aqueous dispersion of particles.
    Type: Grant
    Filed: December 2, 2019
    Date of Patent: May 14, 2024
    Assignee: Magnesium Elektron Limited
    Inventors: David Alastair Scapens, Deborah Jayne Harris
  • Patent number: 11760653
    Abstract: This invention relates to azirconium hydroxideor zirconium oxide comprising, on an oxide basis, up to 30 wt % of a dopant comprising one or more of silicon, sulphate, phosphate, tungsten, niobium, aluminium, molybdenum, titanium or tin, and having acid sites, wherein the majority of the acid sites are Lewis acid sites. In addition, the invention relates to a catalyst, catalyst support or precursor, binder, functional binder, coating or sorbent comprising the zirconium hydroxide or zirconium oxide.
    Type: Grant
    Filed: January 30, 2017
    Date of Patent: September 19, 2023
    Assignee: Magnesium Elektron Limited
    Inventors: Hazel Stephenson, Iryna Chepurna, Deborah Jayne Harris, David Scapens
  • Patent number: 11613473
    Abstract: A cerium-zirconium based mixed oxide composition have: (a) a Ce:Zr molar ratio of 1 or less, and (b) a cerium oxide content of 10-50% by weight. The composition has (i) a surface area of at least 18 m2/g, and a total pore volume as measured by N2 physisorption of at least 0.11 cm3/g, after ageing at 1100° C. in an air atmosphere for 6 hours, (ii) a surface area of at least 42 m2/g, and a total pore volume as measured by N2 physisorption of at least 0.31 cm3/g, after ageing at 1000° C. in an air atmosphere for 4 hours, and (iii) Dynamic Oxygen Storage Capacity (D-OSC) value as measured by H2-TIR of greater than 500 ?mol/g at 600° C. after aging at 800° C. in an air atmosphere for 2 hours. A process contacts the exhaust gas with the composition Another process is for preparing the composition.
    Type: Grant
    Filed: October 27, 2016
    Date of Patent: March 28, 2023
    Assignee: Magnesium Elektron Limited
    Inventors: Deborah Jayne Harris, David Alastair Scapens
  • Publication number: 20220080393
    Abstract: This invention relates to an aqueous dispersion of particles, the dispersion having a particle content of 10-70 wt %, and the particles comprising, on an oxide basis: (a) 10-98 wt % in total of ZrO2+HfO2, and (b) 2-90 wt % in total of AI2O3, CeO2, La2O3, Nd2O3, Pr6O11, Y2O3, or a transition metal oxide, wherein the dispersion has a Z-average particle size of 100-350 nm and the particles have a crystallite size of 1-9 nm. The invention also relates to a substrate coated with the aqueous dispersion of particles.
    Type: Application
    Filed: December 2, 2019
    Publication date: March 17, 2022
    Inventors: David Alastair SCAPENS, Deborah Jayne HARRIS
  • Publication number: 20200101436
    Abstract: A passive NOX adsorbent includes: palladium, platinum or a mixture thereof and a mixed or composite oxide including the following elements in percentage by weight, expressed in terms of oxide: 10-90% by weight zirconium and 0.1-50% by weight of least one of the following: a transition metal or a lanthanide series element other than Ce. Although the passive NOX adsorbent can include Ce in an amount ranging from 0.1 to 20% by weight expressed in terms of oxide, advantages are obtained particularly in the case of low-Ce or a substantially Ce-free passive NOx adsorbent.
    Type: Application
    Filed: December 3, 2019
    Publication date: April 2, 2020
    Inventors: Deborah Jayne HARRIS, David Alastair SCAPENS, John G. DARAB, Mark CROCKER, Yaying JI
  • Patent number: 10500562
    Abstract: A passive NOX adsorbent includes: palladium, platinum or a mixture thereof and a mixed or composite oxide including the following elements in percentage by weight, expressed in terms of oxide: 10-90% by weight zirconium and 0.1-50% by weight of least one of the following: a transition metal or a lanthanide series element other than Ce. Although the passive NOX adsorbent can include Ce in an amount ranging from 0.1 to 20% by weight expressed in terms of oxide, advantages are obtained particularly in the case of low-Ce or a substantially Ce-free passive NOx adsorbent.
    Type: Grant
    Filed: April 5, 2018
    Date of Patent: December 10, 2019
    Assignees: Magnesium Elektron Ltd., University of Kentucky Research Foundation
    Inventors: Deborah Jayne Harris, David Alastair Scapens, John G. Darab, Mark Crocker, Yaying Ji
  • Publication number: 20190308164
    Abstract: A passive NOX adsorbent includes: palladium, platinum or a mixture thereof and a mixed or composite oxide including the following elements in percentage by weight, expressed in terms of oxide: 10-90% by weight zirconium and 0.1-50% by weight of least one of the following: a transition metal or a lanthanide series element other than Ce. Although the passive NOX adsorbent can include Ce in an amount ranging from 0.1 to 20% by weight expressed in terms of oxide, advantages are obtained particularly in the case of low-Ce or a substantially Ce-free passive NOx adsorbent.
    Type: Application
    Filed: April 5, 2018
    Publication date: October 10, 2019
    Inventors: Deborah Jayne HARRIS, David Alastair SCAPENS, John G. DARAB, Mark CROCKER, Yaying JI
  • Publication number: 20190292066
    Abstract: This invention relates to azirconium hydroxideor zirconium oxide comprising, on an oxide basis, up to 30 wt % of a dopant comprising one or more of silicon, sulphate, phosphate, tungsten, niobium, aluminium, molybdenum, titanium or tin, and having acid sites, wherein the majority of the acid sites are Lewis acid sites. In addition, the invention relates to a catalyst, catalyst support or precursor, binder, functional binder, coating or sorbent comprising the zirconium hydroxide or zirconium oxide.
    Type: Application
    Filed: January 30, 2017
    Publication date: September 26, 2019
    Inventors: Hazel STEPHENSON, Iryna CHEPURNA, Deborah Jayne HARRIS, David SCAPENS
  • Publication number: 20180304235
    Abstract: This invention relates to a cerium-zirconium based mixed oxide having: (a) a Ce:Zr molar ratio of 1 or less, and (b) a cerium oxide content of 10-50% by weight, wherein the composition has (i) a surface area of at least 18 m2/g, and a total pore volume as measured by N2 physisorption of at least 0.11 cm3/g, after ageing at 1100° C. in an air atmosphere for 6 hours, and (ii) a surface area of at least 42 m2/g, and a total pore volume as measured by N2 physisorption of at least 0.31 cm3/g, after ageing at 1000° C. in an air atmosphere for 4 hours. The invention also relates to a catalytic system comprising the cerium-zirconium based mixed oxide, as well as to a process 10 for treating an exhaust gas from a vehicle engine comprising contacting the exhaust gas with the cerium-zirconium based mixed oxide.
    Type: Application
    Filed: October 27, 2016
    Publication date: October 25, 2018
    Inventors: Deborah Jayne HARRIS, David Alastair SCAPENS
  • Patent number: 9011806
    Abstract: The invention relates to a method for treating a gas containing nitrogen oxides (NOx), in which an NOx-reduction reaction is carried out using a nitrogen-containing reducing agent, which invention is characterized in that the catalyst used for the reduction reaction is a catalytic system containing a composition comprising zirconium, cerium and niobium in the following percentages by weight, expressed in terms of the weight of oxide: 10-50% of cerium, 5-20% of niobium and the remainder consisting of zirconium.
    Type: Grant
    Filed: February 28, 2012
    Date of Patent: April 21, 2015
    Assignees: Rhodia Operations, Magnesium Elektron Limited
    Inventors: Laure Bisson, Julien Hernandez, Rui Miguel Jorge Coelho Marques, Emmanuel Rohart, Mila Bortun, Deborah Jayne Harris, Clare Jones
  • Patent number: 8734742
    Abstract: A method is described for treating a gas including nitrogen oxides (NOx). The method can include conducting a reduction reaction of the nitrogen oxides with a nitrogen reducing agent. Further described, is a catalyst used for the reduction reaction which is a catalytic system including a composition based on cerium oxide and including niobium oxide in a proportion by a mass of from 2% to 20%.
    Type: Grant
    Filed: September 28, 2011
    Date of Patent: May 27, 2014
    Assignee: Rhodia Operations
    Inventors: Julien Hernandez, Emmanuel Rohart, Rui Jorge Coelho Marques, Deborah Jayne Harris, Clare Jones
  • Publication number: 20140044629
    Abstract: The invention relates to a method for treating a gas containing nitrogen oxides (NOx), in which an NOx-reduction reaction is carried out using a nitrogen-containing reducing agent, which invention is characterized in that the catalyst used for the reduction reaction is a catalytic system containing a composition comprising zirconium, niobium in the following percentages by weight, expressed in terms of the weight of oxide: 10-50% of cerium, 5-20% of niobium and the remainder consisting of zirconium.
    Type: Application
    Filed: February 28, 2012
    Publication date: February 13, 2014
    Applicants: MAGNESIUM ELEKTRON LIMITED, RHODIA OPERATIONS
    Inventors: Laure Bisson, Julien Hernandez, Rui Miguel Jorge Coelho Marques, Emmanuel Rohart, Mila Bortun, Deborah Jayne Harris, Clare Jones
  • Publication number: 20130195743
    Abstract: A method is described for treating a gas including nitrogen oxides (NOx). The method can include conducting a reduction reaction of the nitrogen oxides with a nitrogen reducing agent. Further described, is a catalyst used for the reduction reaction which is a catalytic system including a composition based on cerium oxide and including niobium oxide in a proportion by a mass of from 2% to 20%.
    Type: Application
    Filed: September 28, 2011
    Publication date: August 1, 2013
    Applicants: MAGNESIUM ELEKTRON LIMITED, RHODIA OPERATIONS
    Inventors: Julien Hernandez, Emmanuel Rohart, Rui Jorge Coelho Marques, Deborah Jayne Harris, Clare Jones