Granted Patent
Utility
US 5,426,170 · App. 08/158,518
Method for preparing an aromatic polycarbonate
Inventors:
Motokazu Hirao, Yoshiyuki Totani, Tomonori Ito, Masakatsu Nakatsuka, Akihiro Yamaguchi
Patented Case
View Patent ↗
Granted: Jun 20, 1995
Filed: Nov 29, 1993
Inventors
Motokazu Hirao
Yoshiyuki Totani
Tomonori Ito
Masakatsu Nakatsuka
Akihiro Yamaguchi
Assignee (at issue)
Mitsui Toatsu Chemicals, Incorporated
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.