Granted Patent
Utility
US 4,454,302 · App. 06/411,273
Polyester resin composition
Inventors:
Yasuhiro Ohmura, Seiichiro Maruyama, Shigeru Shigemoto
Patented Case
View Patent ↗
Granted: Jun 12, 1984
Filed: Aug 25, 1982
Inventors
Yasuhiro Ohmura
Seiichiro Maruyama
Shigeru Shigemoto
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.