Patents by Inventor Glenn Eugene Schaefer

Glenn Eugene Schaefer 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).

  • Admixtures for shrink crack reduction of portland cement-based mortars and concretes
    Patent number: 8784558
    Abstract: Portland Cement-based concretes and mortars exhibit significant reduction in shrinkage cracking when combined with Magnesium Oxide (MgO), Shrinkage Reduction Admixtures (SRA) and Super Absorbent Polymers (SAP). However, MgO is a solid that reacts with water, SRA is a liquid, and SAP if not added properly could pull water out of the system and thus increase shrinkage. Unique admixture blends used as supplementary cementing materials that do not significantly affect concrete or cement strength properties of Portland cement itself address such issues. Proper ratios of MgO, SRA and/or SAP perform better against crack reduction when compared to commonly used Expansive Cements (EC).
    Type: Grant
    Filed: May 26, 2011
    Date of Patent: July 22, 2014
    Assignee: Premier Magnesia, LLC
    Inventors: Neal Steven Berke, Glenn Eugene Schaefer, Jerry Elliot Rademan, Ronald Wardle, Mark Shand
  • Admixtures for Shrink Crack Reduction of Portland Cement-Based Mortars and Concretes
    Publication number: 20120298012
    Abstract: Portland Cement-based concretes and mortars exhibit significant reduction in shrinkage cracking when combined with Magnesium Oxide (MgO), Shrinkage Reduction Admixtures (SRA) and Super Absorbent Polymers (SAP). However, MgO is a solid that reacts with water, SRA is a liquid, and SAP if not added properly could pull water out of the system and thus increase shrinkage. Unique admixture blends used as supplementary cementing materials that do not significantly affect concrete or cement strength properties of Portland cement itself address such issues. Proper ratios of MgO, SRA and/or SAP perform better against crack reduction when compared to commonly used Expansive Cements (EC).
    Type: Application
    Filed: May 26, 2011
    Publication date: November 29, 2012
    Applicant: Premier Magnesia, LLC
    Inventors: Neal S. Berke, Glenn Eugene Schaefer, Jerry Elliott Rademan, Ronald Wardle, Mark Shand