Granted Patent
Utility
US 4,870,121 · App. 07/112,079
Electrical tree suppression in high-voltage polymeric insulation
Inventors:
Soli S. Bamji, Aleksander T. Bulinski, John Densley
Patented Case
View Patent ↗
Granted: Sep 26, 1989
Filed: Oct 26, 1987
Inventors
Soli S. Bamji
Aleksander T. Bulinski
John Densley
Assignee (at issue)
Canadian Patents and Development 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.