Granted Patent
Utility
US 6,221,502 · App. 09/146,335
Easy-cleavage shrink laminate film and the bag using the same
Inventors:
Masao Takashige, Takeo Hayashi
Patented Case
View Patent ↗
Granted: Apr 24, 2001
Filed: Sep 2, 1998
Inventors
Masao Takashige
Takeo Hayashi
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.