Patents by Inventor Howard Winkelbauer

Howard Winkelbauer 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).

  • Ultra high strength proppant and method of preparing the same
    Patent number: 11053432
    Abstract: A proppant having a high alumina content, low iron content and low alkali content may be prepared from a raw bauxite ore containing greater than 60 wt. % tri-hydrate alumina. The proppant may further be prepared from calcined bauxite having greater than 80 wt. % tri-hydrate alumina.
    Type: Grant
    Filed: July 27, 2018
    Date of Patent: July 6, 2021
    Assignee: First Bauxite LLC
    Inventors: Bryan Geary, Carl Sorrell, Howard Winkelbauer, Craig Searchfield
  • ULTRA HIGH STRENGTH PROPPANT AND METHOD OF PREPARING THE SAME
    Publication number: 20190048253
    Abstract: A proppant having a high alumina content, low iron content and low alkali content may be prepared from a raw bauxite ore containing greater than 60 wt. % tri-hydrate alumina. The proppant may further be prepared from calcined bauxite having greater than 80 wt. % tri-hydrate alumina.
    Type: Application
    Filed: July 27, 2018
    Publication date: February 14, 2019
    Inventors: Bryan Geary, Carl Sorrell, Howard Winkelbauer, Craig Searchfield
  • Chromia-alumina refractory
    Patent number: 7754633
    Abstract: A refractory composition comprising at least 50 weight percent chromic oxide (Cr2O3), as measured by chemical analysis. The composition includes fused chromia-containing grain, powdered chromic oxide and sintered chromia-containing grain. The fused chromia-containing grain and the sintered chromia-containing grain comprise at least 50 weight percent chromia oxide, as measured by chemical analysis.
    Type: Grant
    Filed: July 22, 2008
    Date of Patent: July 13, 2010
    Assignee: Harbison-Walker Reeractories Company
    Inventors: H. David Prior, Howard Winkelbauer, Viktor Fischer
  • CHROMIA-ALUMINA REFRACTORY
    Publication number: 20100019419
    Abstract: A refractory composition comprising at least 50 weight percent chromic oxide (Cr2O3), as measured by chemical analysis. The composition includes fused chromia-containing grain, powdered chromic oxide and sintered chromia-containing grain. The fused chromia-containing grain and the sintered chromia-containing grain comprise at least 50 weight percent chromia oxide, as measured by chemical analysis.
    Type: Application
    Filed: July 22, 2008
    Publication date: January 28, 2010
    Inventors: H. David Prior, Howard Winkelbauer, Viktor Fischer