Granted Patent
Utility
US 4,255,303 · App. 06/033,328
Polyethylene composition containing talc filler for electrical applications
Inventor:
Michael J. Keogh
Patented Case
View Patent ↗
Granted: Mar 10, 1981
Filed: Apr 25, 1979
Inventor
Michael J. Keogh
Assignee (at issue)
Union Carbide 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.