Granted Patent
Utility
US 4,813,575 · App. 07/102,329
Non-refillable valve for pressurized containers
Inventor:
Robert F. O'Connor
Patented Case
View Patent ↗
Granted: Mar 21, 1989
Filed: Sep 29, 1987
Inventor
Robert F. O'Connor
Assignee (at issue)
Amtrol, 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.