Patents by Inventor Dale C. Andrews

Dale C. Andrews 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: 11401216
    Abstract: A composition for use in concrete may generally comprise, based on total dry weight percent of the composition: at least 50% calcium carbonate and magnesium carbonate; 1-40% pozzolan; up to 3% calcium oxide; up to 2% plasticizer; up to 5% metal salt; and balance of incidental impurities. Methods of making and using the same are also described.
    Type: Grant
    Filed: July 25, 2018
    Date of Patent: August 2, 2022
    Assignee: CARMEUSE LIME, INC.
    Inventors: Lance Olson, Dale C Andrews
  • Patent number: 10414693
    Abstract: Compositions for the treatment of flue gas desulfurization scrubber effluent may generally comprise, based on weight percent of the composition, at least 50% fly ash, up to 20% calcium oxide and/or calcium hydroxide, up to 2% plasticizer and a balance of incidental impurities. Methods for the treatment of flue gas desulfurization scrubber effluent using the composition for the treatment of flue gas desulfurization scrubber effluent are also described.
    Type: Grant
    Filed: July 24, 2018
    Date of Patent: September 17, 2019
    Assignee: Carmeuse North America
    Inventors: Dale C. Andrews, Lance Olson
  • Publication number: 20190023615
    Abstract: Compositions for the treatment of flue gas desulfurization scrubber effluent may generally comprise, based on weight percent of the composition, at least 50% fly ash, up to 20% calcium oxide and/or calcium hydroxide, up to 2% plasticizer and a balance of incidental impurities. Methods for the treatment of flue gas desulfurization scrubber effluent using the composition for the treatment of flue gas desulfurization scrubber effluent are also described.
    Type: Application
    Filed: July 24, 2018
    Publication date: January 24, 2019
    Applicant: Carmeuse North America
    Inventors: Dale C. Andrews, Lance Olson