Patents by Inventor Friedrich Srienc

Friedrich Srienc 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).

  • Biopolymers and biopolymer blends, and method for producing same
    Patent number: 6479145
    Abstract: Biopolymers and biopolymer blends, including block copolymers, prepared via enzyme-mediated catalysis preferably in a microorganism host in which the reaction conditions are selected to produce biopolymers and biopolymer blends having particular chemical compositions and microstructures.
    Type: Grant
    Filed: September 9, 1999
    Date of Patent: November 12, 2002
    Assignee: Regents of the University of Minnesota
    Inventors: Friedrich Srienc, Aaron S. Kelley, Nikolaos Mantzaris
  • Modified pseudomonas oleovorans phaC1 nucleic acids encoding bispecific polyhydroxyalkanoate polymerase
    Patent number: 6143952
    Abstract: A genetically engineered Pseudomonas oleovorans phaC1 polyhydroxyalkanoate (PHA) polymerase having tailored substrate specificity is provided. The modified PHA polymerase is preferably a "bispecific" PHA polymerase capable of copolymerizing a short chain length monomer and a medium chain length monomer is provided. Methods for making the modified PHA polymerase and for making nucleic acids encoding the modified PHA polymerase are also disclosed, as are methods of producing PHA using the modified PHA polymerase. The invention further includes methods to assay for altered substrate specificity.
    Type: Grant
    Filed: March 31, 1998
    Date of Patent: November 7, 2000
    Assignee: Regents of the University of Minnesota
    Inventors: Friedrich Srienc, John K. Jackson, David A. Somers
  • Polyhydroxyalkanoate synthesis in plants
    Patent number: 6103956
    Abstract: Novel transgenic plants and plant cells are capable of biosynthesis of polyhydroxyalkanoate (PHA). Heterologous enzymes involved in PHA biosynthesis, particularly PHA polymerase, are targeted to the peroxisome of a transgenic plant. Transgenic plant materials that biosynthesize short chain length monomer PHAs in the absence of heterologous .beta.-ketothiolase and acetoacetyl-CoA reductase are also disclosed.
    Type: Grant
    Filed: March 31, 1998
    Date of Patent: August 15, 2000
    Assignee: Regents of the University of Minnesota
    Inventors: Friedrich Srienc, David A. Somers, J. J. Hahn, Arthur C. Eschenlauer