Granted Patent
Utility
US 6,093,804 · App. 09/159,461
Method for purification of alpha-1 proteinase inhibitor
Inventors:
Annemarie H. Ralston, William H. Drohan
Patented Case
View Patent ↗
Granted: Jul 25, 2000
Filed: Sep 24, 1998
Inventors
Annemarie H. Ralston
William H. Drohan
Assignee (at issue)
The American National Red Cross
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.