Granted Patent
Utility
US 4,331,233 · App. 06/154,684
Activation closure for vial
Inventor:
George W. Braymer, Jr.
Patented Case
View Patent ↗
Granted: May 25, 1982
Filed: May 30, 1980
Inventor
George W. Braymer, Jr.
Assignee (at issue)
The Upjohn Co.
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.