Granted Patent
Utility
US 4,576,594 · App. 06/634,838
Vented drip chamber for use with a syringe
Inventor:
John S. Greenland
Patented Case
View Patent ↗
Granted: Mar 18, 1986
Filed: Jul 26, 1984
Inventor
John S. Greenland
Assignee (at issue)
WARNER-LAMBERT COMPANY LLC
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.