Patents by Inventor Heather D. Hamje

Heather D. Hamje 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).

  • Diesel boiling-range fuel blend and methods of making the same
    Patent number: 11084998
    Abstract: Diesel boiling-range fuel blends including renewable diesel, biodiesel, and petrodiesel, where the diesel boiling-range fuel blend is capable of producing a minimal volume change of at least one swellable elastomer in a diesel boiling-range fuel system are provided herein. Methods of making the diesel boiling-range fuel blend as well as methods of reducing swellable elastomer shrinkage are also provided herein.
    Type: Grant
    Filed: January 23, 2018
    Date of Patent: August 10, 2021
    Assignee: EXXONMOBIL RESEARCH AND ENGINEERING COMPANY
    Inventors: Alexander S. Freer, Charles D. Lund, Heather D. Hamje, Krystal B. Wrigley, Kenneth C. H. Kar
  • DIESEL BOILING-RANGE FUEL BLEND AND METHODS OF MAKING THE SAME
    Publication number: 20180237710
    Abstract: Diesel boiling-range fuel blends including renewable diesel, biodiesel, and petrodiesel, where the diesel boiling-range fuel blend is capable of producing a minimal volume change of at least one swellable elastomer in a diesel boiling-range fuel system are provided herein. Methods of making the diesel boiling-range fuel blend as well as methods of reducing swellable elastomer shrinkage are also provided herein.
    Type: Application
    Filed: January 23, 2018
    Publication date: August 23, 2018
    Inventors: Alexander S. FREER, Charles D. LUND, Heather D. HAMJE, Krystal B. WRIGLEY, Kenneth C.H. KAR
  • Fourier transform infrared (FTIR) chemometric method to determine cetane number of diesel fuels containing fatty acid alkyl ester additives
    Patent number: 7420170
    Abstract: The present invention is a method to determine the cetane number of a diesel fuel containing a fatty acid alkyl ester including determining the infrared spectrum of the fuel and correlating the spectrum to the cetane number using a multivariate-based Mid-FTIR model. The fatty acid alkyl ester may be rapeseed methyl ester and the infrared spectrum includes the frequency ranges 4900-3500 cm?1 and 2200-1624 cm?1 or the frequency ranges 4900-3500 cm?1 2200-1800 cm?1 and 1700-1624 cm?1.
    Type: Grant
    Filed: January 9, 2007
    Date of Patent: September 2, 2008
    Assignee: Exxonmobil Research and Engineering Company
    Inventors: Luis Ramirez-Arizmendi, Heather D. Hamje