Granted Patent
Utility
US 5,089,549 · App. 07/427,367
Polyimide resin solution compositions
Inventor:
Hideto Kato
Patented Case
View Patent ↗
Granted: Feb 18, 1992
Filed: Oct 27, 1989
Inventor
Hideto Kato
Assignee (at issue)
Shin-Etsu Chemical 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.