Patents by Inventor Keith Backman

Keith Backman 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).

  • Microorganisms for the production of tryptophan and process for the preparation thereof
    Patent number: 6180373
    Abstract: A tryptophan producing strain of microorganism is selected from E. coli and Corynebacteria and is tryptophan feedback resistant and serine feedback resistant. The serine feedback resistance is by a mutation in a serA allele, where the mutated serA allele codes for a protein which has a Ki value for serine between 0.1 mM and 50 mM. The tryptophan feedback resistance is by a trpE allele which codes for a protein which has a Ki value for tryptophan between 0.1 mM and 20 mM. A process for preparing this microorganism and a process for using this microorganism are disclosed.
    Type: Grant
    Filed: April 12, 1995
    Date of Patent: January 30, 2001
    Assignee: Consortium f{umlaut over (u)}r elektrochemische Industrie GmbH
    Inventors: G{umlaut over (u)}nter Wich, Walfred Leinfelder, Keith Backman