Granted Patent
Utility
US 4,750,533 · App. 06/807,440
Filling valve for counterpressure filling of cans
Inventor:
Chung J. Yun
Patented Case
View Patent ↗
Granted: Jun 14, 1988
Filed: Dec 10, 1985
Inventor
Chung J. Yun
Assignee (at issue)
Crown, Cork & Seal Company, 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.