Granted Patent
Utility
US 4,957,864 · App. 07/213,489
Novel plasminogen activator and its preparation process
Inventor:
Seishi Takahashi
Patented Case
View Patent ↗
Granted: Sep 18, 1990
Filed: Jun 30, 1988
Inventor
Seishi Takahashi
Assignee (at issue)
Mitsui Toatsu Chemicals, Incorporated
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.