Granted Patent
Utility
US 4,554,299 · App. 06/722,629
Controlling the rate of diamine curing agents in polyurethane cements
Inventor:
Paul E. Liggett
Patented Case
View Patent ↗
Granted: Nov 19, 1985
Filed: Apr 12, 1985
Inventor
Paul E. Liggett
Assignee (at issue)
Goodyear Aerospace 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.