Granted Patent
Utility
US 4,699,949 · App. 06/747,147
Hardening of acid-hardenable compositions containing a blocked hardening catalyst, using heat
Inventors:
Godwin Berner, Werner Rutsch
Patented Case
View Patent ↗
Granted: Oct 13, 1987
Filed: Jun 20, 1985
Inventors
Godwin Berner
Werner Rutsch
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.