Granted Patent
Utility
US 5,552,479 · App. 08/185,353
Gas barrier film and production process thereof
Inventors:
Hideaki Tanaka, Hiroyuki Oba, Kazuhiko Hirose
Patented Case
View Patent ↗
Granted: Sep 3, 1996
Filed: Jan 24, 1994
Inventors
Hideaki Tanaka
Hiroyuki Oba
Kazuhiko Hirose
Assignee (at issue)
Kureha Kagaku Kogyo 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.