Patents by Inventor Eliador J. Ghenciu

Eliador J. Ghenciu 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).

  • Carbon dioxide soluble surfactant having two fluoroether CO2-philic tail groups and a head group
    Patent number: 6638749
    Abstract: There is provided a process for the extraction of water soluble biomaterials such as enzymes or proteins into carbon dioxide utilizing certain carbon dioxide-soluble surfactants. Also provided are certain carbon dioxide-soluble surfactants useful in the extraction of proteins. The surfactants are selected from fluoroether sulfate, fluoroether-polyethylene glycol block copolymer, fluoroether-functional sorbitol, and fluoroether dithiocarbamate chelate.
    Type: Grant
    Filed: January 8, 1998
    Date of Patent: October 28, 2003
    Assignees: Genencor International, Inc., University of Pittsburgh
    Inventors: Eric J. Beckman, Eliador J. Ghenciu, Nathaniel T. Becker, Landon M. Steele, Alan J. Russell
  • Extraction of water soluble biomaterials from fluids using a carbon dioxide/surfactant mixture
    Patent number: 6562605
    Abstract: A method is provided for the extraction of water soluble biomaterials such as enzymes or proteins into carbon dioxide utilizing certain carbon dioxide soluble surfactants. The extraction can be performed on an aqueous solution, a fermentation broth or a fluid. The method includes the process steps of forming a carbon dioxide/surfactant mixture which involves dissolving carbon dioxide soluble surfactant(s) in carbon dioxide. The carbon dioxide can be in a liquid or supercritical form and the surfactant includes tail and head groups that interact with the biomaterials. Further, the mixture is added to the aqueous solution, fermentation broth or liquid under conditions to allow for extraction of the biomaterials. The method further includes depressurizing and/or temperature adjusting to remove the water soluble biomaterials. The surfactants include fluroethers, oligomers of propylene-oxide, siloxanes, etc. The biomaterials include proteins or enzymes. The carbon dioxide is suberitical or supercritical.
    Type: Grant
    Filed: November 12, 1996
    Date of Patent: May 13, 2003
    Assignees: Genencor International, Inc., University of Pittsburgh
    Inventors: Eric J. Beckman, Eliador J. Ghenciu, Nathaniel T. Becker, Landon M. Steele