Granted Patent
Utility
US 4,463,147 · App. 06/449,023
Heat-curable mixtures, stable on storage, based on polyimides and containing polymerization catalysts
Inventors:
Hermann Diethelm, Abdul-Cader Zahir
Patented Case
View Patent ↗
Granted: Jul 31, 1984
Filed: Dec 13, 1982
Inventors
Hermann Diethelm
Abdul-Cader Zahir
Assignee (at issue)
Ciba-Geigy
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.