Granted Patent
Utility
US 5,506,301 · App. 08/166,137
Treatment of isocyanate residue
Inventor:
Federico Marques
Patented Case
View Patent ↗
Granted: Apr 9, 1996
Filed: Dec 13, 1993
Inventor
Federico Marques
Assignee (at issue)
Bayer Aktiengesellschaft
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.