Granted Patent
Utility
US 5,224,921 · App. 07/531,175
Small volume collection chamber
Inventors:
T. Michael Dennehey, Joseph C. West, Jr.
Patented Case
View Patent ↗
Granted: Jul 6, 1993
Filed: May 31, 1990
Inventors
T. Michael Dennehey
Joseph C. West, Jr.
Assignee (at issue)
Baxter International 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.