Patents by Inventor Helmut Sassenfeld

Helmut Sassenfeld 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).

  • Increased recovery of active proteins
    Publication number: 20070270577
    Abstract: The invention provides methods of increasing yields of desired conformation of proteins. In particular embodiments, the invention includes contacting preparations of a recombinant protein with a reduction/oxidation coupling reagent for a time sufficient to increase the relative proportion of a desired configurational isomer.
    Type: Application
    Filed: November 22, 2006
    Publication date: November 22, 2007
    Inventors: Helmut Sassenfeld, Richard Remmele, Rebecca McCoy
  • Purification of G-CSF
    Patent number: 5055555
    Abstract: A process for purifying human G-CSF from an aqueous solution including the step of adding NaCl to the solution to selectively precipitate the human G-CSF.
    Type: Grant
    Filed: January 5, 1989
    Date of Patent: October 8, 1991
    Inventor: Helmut Sassenfeld