Granted Patent
Utility
US 4,426,549 · App. 06/396,755
Track and erosion resistant electrical insulation comprising zinc borate and ethylene polymer
Inventor:
Gary S. Natwig
Patented Case
View Patent ↗
Granted: Jan 17, 1984
Filed: Jul 9, 1982
Inventor
Gary S. Natwig
Assignee (at issue)
High Voltage Engineering 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.