Granted Patent
Utility
US 6,290,085 · App. 09/257,792
Partitioned closed container, its production method and pressure container
Inventor:
Masaharu Tochigi
Patented Case
View Patent ↗
Granted: Sep 18, 2001
Filed: Feb 25, 1999
Inventor
Masaharu Tochigi
Assignee (at issue)
Showa Denko K.K.
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.