Granted Patent
Utility
US 4,525,572 · App. 06/600,867
Heat-curable mixtures, stable on storage, based on polyimides and containing polymerization catalysts
Inventors:
Hermann Diethelm, Sheik A. Zahir
Patented Case
View Patent ↗
Granted: Jun 25, 1985
Filed: Apr 16, 1984
Inventors
Hermann Diethelm
Sheik A. 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.