Granted Patent
Utility
US 4,889,531 · App. 07/058,573
Dry bottle drainage system
Inventors:
Nicholas F. D'Antonio, Nicholas J. D'Antonio
Patented Case
View Patent ↗
Granted: Dec 26, 1989
Filed: Aug 6, 1987
Inventors
Nicholas F. D'Antonio
Nicholas J. D'Antonio
Assignee (at issue)
Pfizer Hospital Products Group, 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.