Granted Patent
Utility
US 4,509,821 · App. 06/528,489
Filling material for electric cable
Inventor:
Richard J. Stenger
Patented Case
View Patent ↗
Granted: Apr 9, 1985
Filed: Sep 1, 1983
Inventor
Richard J. Stenger
Assignee (at issue)
SUN-TECH LIMITED
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.