Granted Patent
Utility
US 4,599,397 · App. 06/683,518
Wholly aromatic polyester and process for producing the same
Inventors:
Tamotsu Yoshimura, Masahiko Nakamura, Atsushi Kasai
Patented Case
View Patent ↗
Granted: Jul 8, 1986
Filed: Dec 19, 1984
Inventors
Tamotsu Yoshimura
Masahiko Nakamura
Atsushi Kasai
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.