Patents by Inventor Nathaniel D. URBAN

Nathaniel D. URBAN 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).

  • Slurry composition and method of selective silica polishing
    Patent number: 11193044
    Abstract: An acidic slurry composition for use in chemical-mechanical polishing including an acid pH adjuster and a cationic polishing suppressant comprising a quaternized aromatic heterocycle. The quaternized aromatic heterocycle imparts a polishing selectivity of silica over crystalline silicon of at least 100.
    Type: Grant
    Filed: August 2, 2017
    Date of Patent: December 7, 2021
    Assignee: Ferro Corporation
    Inventor: Nathaniel D. Urban
  • Slurry Composition And Method Of Selective Silica Polishing
    Publication number: 20200079975
    Abstract: An acidic slurry composition for use in chemical-mechanical polishing including an acid pH adjuster and a cationic polishing suppressant comprising a quaternized aromatic heterocycle. The quaternized aromatic heterocycle imparts a polishing selectivity of silica over crystalline silicon of at least 100.
    Type: Application
    Filed: August 2, 2017
    Publication date: March 12, 2020
    Applicant: Ferro Corporation
    Inventor: Nathaniel D. URBAN
  • Slurry composition and method of use
    Patent number: 10544332
    Abstract: A slurry composition for use in chemical-mechanical polishing sapphire substrates and includes an alkaline pH adjuster and an accelerant.
    Type: Grant
    Filed: July 18, 2016
    Date of Patent: January 28, 2020
    Assignee: Ferro Corporation
    Inventors: Mohammed H. Megherhi, Nathaniel D. Urban, Yie Shein Her
  • Slurry composition and additives and method for polishing organic polymer-based ophthalmic substrates
    Patent number: 10508220
    Abstract: The present invention provides a slurry composition and method for polishing organic polymer-based ophthalmic substrates. The slurry composition according to the invention includes an aqueous dispersion of abrasive particles and one of a polyvinyl alcohol compound, and a tertiary amide functionalized compound. The abrasive particles can be alumina, zirconia, silica, titania, ceria, spinel or combinations of the foregoing.
    Type: Grant
    Filed: June 13, 2016
    Date of Patent: December 17, 2019
    Assignee: Ferro Corporation
    Inventors: Nathaniel D. Urban, Edward E. Abbott, Yue Liu
  • Slurry Composition And Additives And Method For Polishing Organic Polymer-Based Ophthalmic Substrates
    Publication number: 20180118977
    Abstract: The present invention provides a slurry composition and method for polishing organic polymer-based ophthalmic substrates. The slurry composition according to the invention includes an aqueous dispersion of abrasive particles and one of a polyvinyl alcohol compound, and a tertiary amide functionalized compound. The abrasive particles can be alumina, zirconia, silica, titania, ceria, spinel or combinations of the foregoing.
    Type: Application
    Filed: June 13, 2016
    Publication date: May 3, 2018
    Inventors: Nathaniel D. Urban, Edward E. Abbott, Yue Liu
  • Slurry Composition And Method Of Use
    Publication number: 20170204293
    Abstract: A slurry composition for use in chemical-mechanical polishing sapphire substrates and includes an alkaline pH adjuster and an accelerant.
    Type: Application
    Filed: July 18, 2016
    Publication date: July 20, 2017
    Inventors: Mohammed H. MEGHERHI, Nathaniel D. URBAN, Yie Shein HER