Granted Patent
Utility
US 4,909,432 · App. 07/257,251
Paper container for liquid
Inventor:
Kiichiro Nagata
Patented Case
View Patent ↗
Granted: Mar 20, 1990
Filed: Oct 13, 1988
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.