Granted Patent
Utility
US 4,874,836 · App. 07/262,796
Thermoplastic wholly aromatic polyimide esters and process for producing the same
Inventors:
Makoto Wakabayashi, Kenichi Fujiwara, Hideo Hayashi
Patented Case
View Patent ↗
Granted: Oct 17, 1989
Filed: Oct 26, 1988
Inventors
Makoto Wakabayashi
Kenichi Fujiwara
Hideo Hayashi
Assignee (at issue)
Idemitsu Petrochemical Co., 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.