Patents by Inventor John F. Stageman

John F. Stageman 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).

  • Extraction process
    Patent number: 4562245
    Abstract: A continuous process for the extraction of 3-hydroxybutyrate polymers from micro-organism cells wherein a non-solvent is added to the extracted syrup to permit separation of the polymer and, by distillation, the bulk of the extraction liquid, which may be a solvent/non-solvent mixture, is recovered for re-use. Preferably the non-solvent added to the syrup is also recovered in the distillation.
    Type: Grant
    Filed: April 16, 1984
    Date of Patent: December 31, 1985
    Assignee: Imperial Chemical Industries PLC
    Inventor: John F. Stageman