Granted Patent
Utility
US 5,521,082 · App. 07/967,920
Novel process for purification of hepatitis a virions
Inventors:
John A. Lewis, Marcy E. Armstrong, Emilio Emini
Patented Case
View Patent ↗
Granted: May 28, 1996
Filed: Oct 28, 1992
Inventors
John A. Lewis
Marcy E. Armstrong
Emilio Emini
Assignee (at issue)
MERCK & CO., 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.