Granted Patent
Utility
US 4,539,347 · App. 06/652,581
Novolac based epoxy resin curing agents for use in aqueous systems
Inventor:
William J. DeGooyer
Patented Case
View Patent ↗
Granted: Sep 3, 1985
Filed: Sep 20, 1984
Inventor
William J. DeGooyer
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.