Granted Patent
Utility
US 4,858,780 · App. 07/242,127
Hermetically sealed package and method of producing the same
Inventors:
Hiroshi Odaka, Tsuyoshi Kishida
Patented Case
View Patent ↗
Granted: Aug 22, 1989
Filed: Sep 9, 1988
Inventors
Hiroshi Odaka
Tsuyoshi Kishida
Assignee (at issue)
Idemitsu Petrochemical 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.