Granted Patent
Utility
US 4,914,145 · App. 07/062,415
Polyester composition
Inventors:
Akira Tohdoh, Takashi Nagai, Takayuki Nakano, Takashi Ueda
Patented Case
View Patent ↗
Granted: Apr 3, 1990
Filed: Jun 16, 1987
Inventors
Akira Tohdoh
Takashi Nagai
Takayuki Nakano
Takashi Ueda
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.