Patents by Inventor James Kermit Withrow

James Kermit Withrow 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).

  • Recovery and refining of dianhydrosugars
    Patent number: 9765084
    Abstract: A process for the production of a refined dianhydrosugar-containing product is disclosed. The process includes controlled continuous crystallization of the dianhydrosugar-containing product to produce a solution saturated with the dianhydrosugar. The saturated solution is mechanically separated, for example by centrifugation, and the crystalline product is washed. The only solvent used is water. The dianhydrosugar-containing product is upgraded to at least 99.8% purity and recovery is 95% or greater. Recrystallization of the dianhydrosugar of 99.8% purity results in an ultra pure product containing at least 99.99% dianhydrosugar.
    Type: Grant
    Filed: April 9, 2009
    Date of Patent: September 19, 2017
    Assignee: Iowa Corn Promotion Board
    Inventors: Charles Guthrie Moyers, James Kermit Withrow, John Leonard Stephens
  • Recovery and Refining of Dianhydrosugars
    Publication number: 20090259056
    Abstract: A process for the production of a refined dianhydrosugar-containing product is disclosed. The process includes controlled continuous crystallization of the dianhydrosugar-containing product to produce a solution saturated with the dianhydrosugar. The saturated solution is mechanically separated, for example by centrifugation, and the crystalline product is washed. The only solvent used is water. The dianhydrosugar-containing product is upgraded to at least 99.8% purity and recovery is 95% or greater. Recrystallization of the dianhydrosugar of 99.8% purity results in an ultra pure product containing at least 99.99% dianhydrosugar.
    Type: Application
    Filed: April 9, 2009
    Publication date: October 15, 2009
    Applicant: IOWA CORN PROMOTION BOARD
    Inventors: Charles Guthrie Moyers, James Kermit Withrow, John Leonard Stephens