Patents by Inventor Roger D. Calhoon

Roger D. Calhoon 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).

  • Cyclic di-guanylate metabolic enzymes
    Patent number: 5759828
    Abstract: The present invention provides the nucleotide sequences of Acetobacter operons, cdg operons encoding genes for the biosynthesis and degradation of cyclic diguanosine monophosphate (c-di-GMP). Specifically, the nucleotide sequences and deduced amino acid sequences of 3 phosphodiesterases isozymes, 3 diguanylate cyclase isozymes, and 2 polypeptides of unidentified function are provided. Also provided for are various strains of microorganisms, including Acetobacter cells genetically manipulated so as to produce elevated and/or reduced levels of one or more cdg operon encoded proteins.
    Type: Grant
    Filed: September 20, 1994
    Date of Patent: June 2, 1998
    Assignee: Weyerhaeuser
    Inventors: Rony Tal, David H. Gelfand, Roger D. Calhoon, Arie Ben-Bassat, Moshe Benziman, Hing Cheung Wong
  • Methods and nucleic acid sequences for the expression of the cellulose synthase operon
    Patent number: 5268274
    Abstract: Nucleic acid sequences encoding the bacterial cellulose synthase operon derived from Acetobacter are disclosed. Methods for isolating the genes, vectors containing the genes, and transformed hosts useful for the expression of recombinant bacterial cellulose synthase or production of cellulose are also described.
    Type: Grant
    Filed: April 22, 1991
    Date of Patent: December 7, 1993
    Assignee: Cetus Corporation
    Inventors: Arie Ben-Bassat, Roger D. Calhoon, Anna L. Fear, David H. Gelfand, James H. Meade, Rony Tal, Hing Wong, Moshe Benziman