Patents by Inventor Brian Fitzwater

Brian Fitzwater 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).

  • Chromate-free ceramic coating compositions for hot corrosion protection of superalloy substrates
    Patent number: 11535560
    Abstract: Hexavalent chromium-free slurry formulations which are suitable in the production of ceramic overlay coating systems are described. The formulations provide superior hot corrosion and heat oxidation protection for superalloy substrates. A basecoat slurry and topcoat slurry are provided. The basecoat slurry includes an aluminum phosphate based aqueous solution having a molar ratio of Al:PO4 higher than about 1:3 with the incorporation of metal oxide particles. The topcoat slurry includes an aluminum phosphate based aqueous solution having a molar ratio of Al:PO4 higher than about 1:3. Both of the basecoat slurry and the topcoat slurry are hexavalent chromium-free.
    Type: Grant
    Filed: May 8, 2019
    Date of Patent: December 27, 2022
    Assignee: Praxair S.T. Technology, Inc.
    Inventors: Irina Belov, Zhihong Tang, Brian Fitzwater, Daryl G Copeland
  • Chromate-Free Ceramic Coating Compositions For Hot Corrosion Protection of Superalloy Substrates
    Publication number: 20200354276
    Abstract: Hexavalent chromium-free slurry formulations which are suitable in the production of ceramic overlay coating systems are described. The formulations provide superior hot corrosion and heat oxidation protection for superalloy substrates. A basecoat slurry and topcoat slurry are provided. The basecoat slurry includes an aluminum phosphate based aqueous solution having a molar ratio of Al:PO4 higher than about 1:3 with the incorporation of metal oxide particles. The topcoat slurry includes an aluminum phosphate based aqueous solution having a molar ratio of Al:PO4 higher than about 1:3. Both of the basecoat slurry and the topcoat slurry are hexavalent chromium-free.
    Type: Application
    Filed: May 8, 2019
    Publication date: November 12, 2020
    Inventors: Irina Belov, Zhihong Tang, Brian Fitzwater, Daryl G. Copeland