Granted Patent
Utility
US 6,008,328 · App. 08/487,830
Method for purifying keratinocyte growth factors
Inventors:
Eric W. Hsu, William Craig Kenney, Tim Tressel
Patented Case
View Patent ↗
Granted: Dec 28, 1999
Filed: Jun 7, 1995
Inventors
Eric W. Hsu
William Craig Kenney
Tim Tressel
Assignee (at issue)
Amgen Inc.
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.