Granted Patent
Utility
US 4,804,720 · App. 07/178,224
Polyamide resin composition
Inventors:
Mitsuhiko Tamura, Masaaki Miyamoto, Masaya Ueda, Eiichi Kamoshida
Patented Case
View Patent ↗
Granted: Feb 14, 1989
Filed: Apr 6, 1988
Inventors
Mitsuhiko Tamura
Masaaki Miyamoto
Masaya Ueda
Eiichi Kamoshida
Assignee (at issue)
Mitsubishi Chemical 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.