Patents by Inventor David W. Kahn

David W. Kahn 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).

  • Patent number: 8906648
    Abstract: A process for recovering and purifying refolded heparin binding proteins produced in heterologous host cells includes the step of incubation of the solubilized protein with a polyanionic species such as dextran sulfate.
    Type: Grant
    Filed: March 26, 2013
    Date of Patent: December 9, 2014
    Assignee: Genentech, Inc.
    Inventors: Michelle D. Butler, Jeffrey L. Cleland, David W. Kahn, Shelly Pizarro, Charles H. Schmelzer, Marjorie E. Winkler
  • Publication number: 20100261888
    Abstract: A process for recovering and purifying refolded heparin binding proteins produced in heterologous host cells includes the step of incubation of the solubilized protein with a polyanionic species such as dextran sulfate.
    Type: Application
    Filed: June 17, 2010
    Publication date: October 14, 2010
    Applicant: Genentech, Inc.
    Inventors: Michelle D. Butler, Jeffrey L. Cleland, David W. Kahn, Shelly Pizarro, Charles H. Schmelzer, Marjorie E. Winkler
  • Patent number: 6140128
    Abstract: A process is described for preparing transfectacons, or particles, of calcium phosphate and a desired nucleic acid comprising admixing calcium divalent cation, phosphate multivalent anion, and the desired nucleic acid to form a precipitation mixture, wherein the precipitation mixture comprises an initial phosphate anion concentration of about 0.2 to 0.5 mM; and incubating the precipitation mixture for about 10 to 60 minutes to form transfectacons comprising calcium phosphate and the desired nucleic acid. A process is also provided for delivering desired nucleic acid to eukaryotic tissue or cells comprising introducing to the tissue or cells the transfectacons so prepared.
    Type: Grant
    Filed: December 20, 1999
    Date of Patent: October 31, 2000
    Assignee: Genentech, Inc.
    Inventors: Darien L. Cohen, David W. Kahn, Marjorie E. Winkler