Granted Patent
Utility
US 5,731,390 · App. 08/434,132
Hydrolytic stable glass fiber reinforced polyester resins
Inventor:
Johannes Helmond
Patented Case
View Patent ↗
Granted: Mar 24, 1998
Filed: May 2, 1995
Inventor
Johannes Helmond
Assignee (at issue)
General Electric Company
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.