Patents by Inventor Robert A. Derk

Robert A. Derk 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).

  • Self-checkout system
    Patent number: 11723480
    Abstract: A self-checkout system including a cabinet supported by a floor, a tilt body coupled to a hinge and located inside the cabinet and a support body being slidably coupled to the tilt body. When the support body is located inside the cabinet, the tilt body is balanced about the hinge and the support body is spaced apart from the floor. When the support body is pulled outside the cabinet, a front of the tilt body is rotated about the hinge and the support body engages with the floor.
    Type: Grant
    Filed: August 4, 2021
    Date of Patent: August 15, 2023
    Assignee: Target Brands, Inc.
    Inventors: Jason W. Johnson, Alex K. Poniatowski, Tyler M. J. Holm, Ben W. O'Brien, Chris I. Hellstrom, Tim F. Gargano, David A. Gnuse, Marian H. Locke, Christopher P. Doepke, Matthew D. Purrington, Robert A. Derk, Shifath Ikram Khan, Jorge S. Noyola, C. Matthew Ramon, Richard K. Steele, Thomas D. Karol
  • SELF-CHECKOUT SYSTEM
    Publication number: 20230038835
    Abstract: A self-checkout system including a cabinet supported by a floor, a tilt body coupled to a hinge and located inside the cabinet and a support body being slidably coupled to the tilt body. When the support body is located inside the cabinet, the tilt body is balanced about the hinge and the support body is spaced apart from the floor. When the support body is pulled outside the cabinet, a front of the tilt body is rotated about the hinge and the support body engages with the floor.
    Type: Application
    Filed: August 4, 2021
    Publication date: February 9, 2023
    Inventors: Jason W. Johnson, Alex K. Poniatowski, Tyler M.J. Holm, Ben W. O'Brien, Chris I. Hellstrom, Tim F. Gargano, David A. Gnuse, Marian H. Locke, Christopher P. Doepke, Matthew D. Purrington, Robert A. Derk, Shifath Ikram Khan, Jorge S. Noyola, C. Matthew Ramon, Richard K. Steele, Thomas D. Karol
  • Flowable fill composition and method
    Patent number: 5951751
    Abstract: A flowable fill composition is shown which is prepared by mixing together a lime component, a pozzolanic component, aggregate material and water. The composition has a set compressive strength after 28 days of 2000 psi or less and is characterized by the substantial absence of cement or other self-setting adhesive components.
    Type: Grant
    Filed: October 26, 1998
    Date of Patent: September 14, 1999
    Assignee: Chemical Lime Company
    Inventors: Devon Williams, Michael Eliasen, Robert A. Derks