Patents by Inventor Rachel Severance

Rachel Severance 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).

  • Rejuvenation of reclaimed asphalt
    Patent number: 10030145
    Abstract: Asphalt compositions comprising reclaimed asphalt and a rejuvenating agent are disclosed. The reclaimed asphalt comprises aggregate and an aged binder. The rejuvenating agent, which has a cyclic content of at least 5 wt. %, comprises an ester or ester blend derived from an acid selected from aromatic acids, fatty acids, fatty acid monomers, fatty acid dimers, fatty acid trimers, rosin acids, rosin acid dimers, and mixtures thereof. The rejuvenating agent revitalizes the aged bitumen binder of reclaimed asphalt and restores its physical properties to those of the original performance-grade bitumen. Improvements include desirable softening, low-temperature cracking resistance, better fatigue cracking resistance, good elevated temperature performance, improved miscibility, and restored temperature sensitivity.
    Type: Grant
    Filed: April 25, 2013
    Date of Patent: July 24, 2018
    Assignee: Kraton Chemical, LLC
    Inventors: Rachel Severance, William Lewis Grady, David Jan Cornelius Broere, Laurent Porot, Tresha Overstreet
  • REJUVENATION OF RECLAIMED ASPHALT
    Publication number: 20140338565
    Abstract: Asphalt compositions comprising reclaimed asphalt and a rejuvenating agent are disclosed. The reclaimed asphalt comprises aggregate and an aged binder. The rejuvenating agent, which has a cyclic content of at least 5 wt. %, comprises an ester or ester blend derived from an acid selected from aromatic acids, fatty acids, fatty acid monomers, fatty acid dimers, fatty acid trimers, rosin acids, rosin acid dimers, and mixtures thereof. The rejuvenating agent revitalizes the aged bitumen binder of reclaimed asphalt and restores its physical properties to those of the original performance-grade bitumen. Improvements include desirable softening, low-temperature cracking resistance, better fatigue cracking resistance, good elevated temperature performance, improved miscibility, and restored temperature sensitivity.
    Type: Application
    Filed: April 25, 2013
    Publication date: November 20, 2014
    Applicant: ARIZONA CHEMICAL COMPANY, LLC
    Inventors: Rachel Severance, William Lewis Grady, David Jan Cornelius Broere, Laurent Porot, Tresha Overstreet