Granted Patent
Utility
US 5,506,056 · App. 08/478,644
Thermoplastic resin composition and use thereof
Inventor:
Yukio Yoshihara
Patented Case
View Patent ↗
Granted: Apr 9, 1996
Filed: Jun 7, 1995
Inventor
Yukio Yoshihara
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.