Granted Patent
Utility
US 5,561,211 · App. 08/449,403
Blocked polyisocyanates with improved thermal stability
Inventors:
Kenneth P. Yonek, Lyuba K. Gindin, Douglas A. Wicks
Patented Case
View Patent ↗
Granted: Oct 1, 1996
Filed: May 23, 1995
Inventors
Kenneth P. Yonek
Lyuba K. Gindin
Douglas A. Wicks
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.