Granted Patent
Utility
US 4,707,512 · App. 06/753,982
Polyester resin composition
Inventors:
Seiichiro Maruyama, Hironori Hayashida, Kazumasa Morita, Yoshitaka Shiraishi
Patented Case
View Patent ↗
Granted: Nov 17, 1987
Filed: Jul 11, 1985
Inventors
Seiichiro Maruyama
Hironori Hayashida
Kazumasa Morita
Yoshitaka Shiraishi
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.