Granted Patent
Utility
US 4,819,861 · App. 07/009,890
Paper container for liquid
Inventor:
Kiichiro Nagata
Patented Case
View Patent ↗
Granted: Apr 11, 1989
Filed: Feb 2, 1987
Inventor
Kiichiro Nagata
Assignee (at issue)
Jujo Paper Co., Ltd.
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.