Granted Patent
Utility
US 5,989,685 · App. 08/858,962
Electreet film composition adapted for printing on inkjet printers
Inventor:
Robert G. Hockaday
Patented Case
View Patent ↗
Granted: Nov 23, 1999
Filed: May 20, 1997
Inventor
Robert G. Hockaday
Assignee (at issue)
Permacharge 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.