Patents by Inventor Darold McCalla

Darold McCalla 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).

  • Process for treatment of biomass feedstocks
    Patent number: 7937851
    Abstract: A method and apparatus for continuously treating a moist biomass feedstock is disclosed. The method includes treating a biomass feedstock with a swelling agent in a pressurized first vessel, transferring the feedstock to a second vessel at a lower operating pressure than the first vessel such that the biomass fibers rupture. At least portions the swelling agent, and/or the moisture are recycled in the process.
    Type: Grant
    Filed: November 9, 2005
    Date of Patent: May 10, 2011
    Assignee: Michigan Biotechnology Institute
    Inventors: Srinivasan Rajagopalan, Tonya Tiedje, Darold McCalla
  • PROCESS FOR TREATMENT OF BIOMASS FEEDSTOCKS
    Publication number: 20090098251
    Abstract: A method and apparatus for continuously treating a moist biomass feedstock is disclosed. The method includes treating a biomass feedstock with a swelling agent in a pressurized first vessel, transferring the feedstock to a second vessel at a lower operating pressure than the first vessel such that the biomass fibers rupture. At least portions the swelling agent, and/or the moisture are recycled in the process.
    Type: Application
    Filed: November 9, 2005
    Publication date: April 16, 2009
    Inventors: Srinivasan Rajagopalan, Tonya Tiedje, Darold McCalla