Granted Patent
Utility
US 4,423,201 · App. 06/437,706
Co-reactive urethane surfactants and stable aqueous epoxy dispersions
Inventor:
Darrell D. Hicks
Patented Case
View Patent ↗
Granted: Dec 27, 1983
Filed: Oct 29, 1982
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.