Granted Patent
Utility
US 4,298,518 · App. 05/827,256
Polyamide resin composition
Inventors:
Yasuhiro Ohmura, Yukinobu Murakami, Ryoji Hidaka
Patented Case
View Patent ↗
Granted: Nov 3, 1981
Filed: Aug 24, 1977
Inventors
Yasuhiro Ohmura
Yukinobu Murakami
Ryoji Hidaka
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.