Granted Patent
Utility
US 4,446,256 · App. 06/493,857
Epoxide resin aqueous dispersant comprising the reaction product of diisocyanate, diol and polyether glycol monoether
Inventor:
Darrell D. Hicks
Patented Case
View Patent ↗
Granted: May 1, 1984
Filed: May 12, 1983
Inventor
Darrell D. Hicks
Assignee (at issue)
Celanese GmbH
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.