Patents by Inventor Jo-Ann T. Schwartz

Jo-Ann T. Schwartz 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: 11066575
    Abstract: Chemical mechanical polishing (CMP) compositions, systems and methods of using the compositions for polishing tungsten or tungsten-containing substrates. The compositions comprise nano-sized abrasive; metal compound coated organic polymer particles as solid state catalyst; oxidizer; tungsten corrosion inhibitor; and a water based liquid carrier.
    Type: Grant
    Filed: September 4, 2019
    Date of Patent: July 20, 2021
    Assignee: Versum Materials US, LLC
    Inventors: Xiaobo Shi, Hongjun Zhou, James Allen Schlueter, Jo-Ann T. Schwartz
  • Publication number: 20200079976
    Abstract: Chemical mechanical polishing (CMP) compositions, systems and methods of using the compositions for polishing tungsten or tungsten-containing substrates. The compositions comprise nano-sized abrasive; metal compound coated organic polymer particles as solid state catalyst; oxidizer; tungsten corrosion inhibitor; and a water based liquid carrier.
    Type: Application
    Filed: September 4, 2019
    Publication date: March 12, 2020
    Applicant: Versum Materials US, LLC
    Inventors: Xiaobo Shi, Hongjun Zhou, James Allen Schlueter, Jo-Ann T. Schwartz
  • Publication number: 20140315386
    Abstract: Solid metal compound coated colloidal particles are made through a process by coating metal compounds onto colloidal particle surfaces. More specifically, metal compound precursors react with the base solution to form solid metal compounds. The solid metal compounds are deposited onto the colloidal particle surfaces through bonding. Excess ions are removed by ultrafiltration to obtain the stable metal compound coated colloidal particle solutions. Chemical mechanical polishing (CMP) polishing compositions using the metal compound coated colloidal particles prepared by the process as the solid state catalyst, or as both catalyst and abrasive, provide uniform removal profiles across the whole wafer.
    Type: Application
    Filed: March 25, 2014
    Publication date: October 23, 2014
    Applicant: AIR PRODUCTS AND CHEMICALS, INC.
    Inventors: Hongjun Zhou, Xiaobo Shi, James A. Schlueter, Jo-Ann T. Schwartz
  • Publication number: 20100304266
    Abstract: A membrane electrode assembly for an organic/air fuel cell is provided comprising a proton exchange membrane, an anode electrode, and a cathode electrode. The proton exchange membrane is made of a highly fluorinated ion-exchange polymer. The anode electrode is comprised of an anode electrocatalyst of platinum and ruthenium supported on particulate carbon and a highly fluorinated ion-exchange polymer binder, and the metal loading in the anode electrode is less than 3 mg/cm2. The cathode electrode is comprised of a cathode electrocatalyst of platinum supported on particulate carbon and a highly fluorinated ion-exchange polymer binder, and the metal loading in the cathode electrode is less than 3 mg/cm2. Organic/air fuel cells comprised of such membrane electrode assemblies are also provided. A process for operating such membrane electrode assemblies of an organic/air fuel cell is also provided.
    Type: Application
    Filed: December 21, 2006
    Publication date: December 2, 2010
    Inventors: Mookkan Periyasamy, Jo-Ann T. Schwartz, Mohamed Abdou, Harvey P. Tannenbaum
  • Publication number: 20080292931
    Abstract: The present invention provides a membrane electrode assembly for an organic/air fuel cell comprising a proton exchange membrane, an anode electrode, and a cathode electrode. The proton exchange membrane is made of a highly fluorinated ion-exchange polymer, and it has opposite first and second sides. The anode electrode is comprised of an anode electrocatalyst and a highly fluorinated ion-exchange polymer binder, and the anode electrocatalyst is comprised of platinum and ruthenium supported on particulate carbon. The cathode electrode is comprised of a cathode electrocatalyst and a highly fluorinated ion-exchange polymer binder, and the cathode electrocatalyst is comprised of platinum and cobalt supported on particulate carbon. The invention is also directed to a process for operating such a membrane electrode assembly in an organic/air fuel cell.
    Type: Application
    Filed: December 21, 2006
    Publication date: November 27, 2008
    Inventors: Jo-Ann T. Schwartz, Harvey P. Tannenbaum, Vinci Martinez Felix
  • Patent number: 6878668
    Abstract: A method for manufacturing of an attrition resistant vanadium/phosphorous oxide catalyst involving forming an aqueous slurry comprising; vanadium/phosphorous oxide catalyst or vanadium/phosphorous oxide catalyst precursor particles, an aqueous solution of H3PO4, and optionally an aqueous colloidal silica sol, an aqueous polysilicic acid solution or mixture thereof and then spray drying the slurry to form attrition resistant catalyst precursor followed by calcining/activating the spray dried precursor. Such a catalyst is particularly useful in oxidation processes such as the catalytic air oxidation of butane to maleic anhydride.
    Type: Grant
    Filed: July 11, 2000
    Date of Patent: April 12, 2005
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Jo-Ann T. Schwartz, Dwain T. Cline, Jr.
  • Patent number: 5478952
    Abstract: Improved hydrogenation catalysts consisting essentially of highly dispersed, reduced ruthenium and rhenium on carbon support and methods of making and using the same. Such catalysts exhibit high conversion rates in aqueous solution hydrogenation of hydrogenatable precursors (e.g., maleic acid, succinic acid, .gamma.-butyrolactone, etc.) to tetrahydrofuran, 1,4-butanediol and mixtures thereof.
    Type: Grant
    Filed: March 3, 1995
    Date of Patent: December 26, 1995
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Jo-Ann T. Schwartz
  • Patent number: 5352645
    Abstract: High-strength, non-agglomerated uniform porous microspheres of silica produced by spray drying a mixture comprising a colloidal silica sol and an additive selected from ammonium citrate or urea; an attrition resistant catalytic composite consisting essentially of metal crystallites such as palladium, platinum-palladium on said silica microsphere and method for preparing the same; and an improved process for making hydrogen peroxide from the direct combination of hydrogen and oxygen in the presence of said attrition resistant catalytic composite.
    Type: Grant
    Filed: November 19, 1992
    Date of Patent: October 4, 1994
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Jo-Ann T. Schwartz
  • Patent number: 5302566
    Abstract: A process is described for preparing attrition resistant catalyst, particularly vanadium/phosphorus oxide catalyst, having an oxide rich surface layer. The oxide rich surface layer is obtained from a stable oxide-forming mixture which contains both colloidal oxide sol and a soluble oxide precursor.
    Type: Grant
    Filed: January 25, 1993
    Date of Patent: April 12, 1994
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Jo Ann T. Schwartz
  • Patent number: 5128114
    Abstract: High-strength, non-agglomerated uniform porous microspheres of silica produced by spray drying a mixture comprising a colloidal silica sol and an additive selected from ammonium citrate or urea; an attrition resistant catalytic composite consisting essentially of metal crystallites such as palladium, platinum-palladium on said silica microsphere and method for preparing the same; and an improved process for making hydrogen peroxide from the direct combination of hydrogen and oxygen in the presence of said attrition resistant catalytic composite.
    Type: Grant
    Filed: September 25, 1990
    Date of Patent: July 7, 1992
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Jo-Ann T. Schwartz
  • Patent number: 4832938
    Abstract: An improved method for making hydrogen peroxide from the direct combination of hydrogen and oxygen using a platinum/palladium catalyst in which the weight ratio of platinum to platinum plus palladium is in the range of about 0.02 to about 0.2.
    Type: Grant
    Filed: May 13, 1988
    Date of Patent: May 23, 1989
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Lawrence W. Gosser, Jo-Ann T. Schwartz
  • Patent number: 4772458
    Abstract: A process for making hydrogen peroxide from hydrogen and oxygen employing an aqueous reaction medium containing a bromide promoter is disclosed.
    Type: Grant
    Filed: November 19, 1986
    Date of Patent: September 20, 1988
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Lawrence W. Gosser, Jo-Ann T. Schwartz