Patents by Inventor Paul Ledtje

Paul Ledtje 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).

  • BIOSOLVENTS USEFUL FOR IMPROVED ASPHALT PRODUCTS UTILIZING RECYCLED ASPHALT PAVEMENT OR OTHER BRITTLE ASPHALT BINDERS SUCH AS VACUUM TOWER BOTTOM
    Publication number: 20230399514
    Abstract: The present application is directed to an asphalt binder composition comprising: an asphalt binder; a compound of formula (I): wherein R, A, n, and m are as described herein, a compound of formula (II): wherein R?, A?, n?, and m? are as described herein. The present application is also directed to further compositions, methods of producing an asphalt binder composition, and methods of paving.
    Type: Application
    Filed: June 22, 2023
    Publication date: December 14, 2023
    Inventors: Eric W. Cochran, Nacu Hernandez, Austin Hohmann, Ronald Christopher Williams, Michael Forrester, Joseph H. Podolsky, Paul Ledtje, Conglin Chen
  • Biosolvents useful for improved asphalt products utilizing recycled asphalt pavement or other brittle asphalt binders such as vacuum tower bottom
    Patent number: 11773265
    Abstract: The present application is directed to an asphalt binder composition comprising: an asphalt binder; a compound of formula (I): wherein R, A, n, and m are as described herein, a compound of formula (II): wherein R?, A?, n?, and m? are as described herein. The present application is also directed to further compositions, methods of producing an asphalt binder composition, and methods of paving.
    Type: Grant
    Filed: September 18, 2020
    Date of Patent: October 3, 2023
    Assignee: IOWA STATE UNIVERSITY RESEARCH FOUNDATION, INC.
    Inventors: Eric W. Cochran, Nacu Hernandez, Austin Hohmann, Ronald Christopher Williams, Michael Forrester, Joseph H. Podolsky, Paul Ledtje, Conglin Chen
  • BIOSOLVENTS USEFUL FOR IMPROVED ASPHALT PRODUCTS UTILIZING RECYCLED ASPHALT PAVEMENT OR OTHER BRITTLE ASPHALT BINDERS SUCH AS VACUUM TOWER BOTTOM
    Publication number: 20210079224
    Abstract: The present application is directed to an asphalt binder composition comprising: an asphalt binder; a compound of formula (I): wherein R, A, n, and m are as described herein, a compound of formula (II): wherein R?, A?, n?, and m? are as described herein. The present application is also directed to further compositions, methods of producing an asphalt binder composition, and methods of paving.
    Type: Application
    Filed: September 18, 2020
    Publication date: March 18, 2021
    Inventors: Eric W. Cochran, Nacu Hernandez, Austin Hohmann, Ronald Christopher Williams, Michael Forrester, Joseph H. Podolsky, Paul Ledtje, Conglin Chen