Granted Patent
Utility
US 5,037,692 · App. 07/340,452
Multilayer structure
Inventors:
Yoshitomo Miyazaki, Jun Nishimura, Takashi Katoh
Patented Case
View Patent ↗
Granted: Aug 6, 1991
Filed: Apr 19, 1989
Inventors
Yoshitomo Miyazaki
Jun Nishimura
Takashi Katoh
Assignee (at issue)
Mitsui Petrochemical Industries, 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.