Granted Patent
Utility
US 6,284,339 · App. 08/985,663
Electret film composition adapted for printing on computer printers and the like
Inventors:
Jack E. Floegel, Calvin B. Ward
Patented Case
View Patent ↗
Granted: Sep 4, 2001
Filed: Dec 9, 1997
Inventors
Jack E. Floegel
Calvin B. Ward
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.