Granted Patent
Utility
US 5,804,420 · App. 08/844,714
Preparation of recombinant Factor VIII in a protein free medium
Inventors:
Sham-Yuen Chan, Kathleen Harris
Patented Case
View Patent ↗
Granted: Sep 8, 1998
Filed: Apr 18, 1997
Inventors
Sham-Yuen Chan
Kathleen Harris
Assignee (at issue)
Bayer Aktiengesellschaft
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.