Granted Patent
Utility
US 4,944,902 · App. 07/456,512
Polyimide compositions and processes
Inventors:
Carroll W. Lanier, Raymond Lee
Patented Case
View Patent ↗
Granted: Jul 31, 1990
Filed: Dec 26, 1989
Inventors
Carroll W. Lanier
Raymond Lee
Assignee (at issue)
Ethyl Corporation
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.