Granted Patent
Utility
US 4,757,119 · App. 07/045,521
Epoxy resin compositions containing poly-(hydrocarbylthio)aromatic diamines
Inventors:
Paul L. Wiggins, Gordon G. Knapp
Patented Case
View Patent ↗
Granted: Jul 12, 1988
Filed: May 4, 1987
Inventors
Paul L. Wiggins
Gordon G. Knapp
Assignee (at issue)
Ethyl Corporation
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.