Granted Patent
Utility
US 5,139,928 · App. 07/601,546
Imageable recording films
Inventor:
David F. Lewis
Patented Case
View Patent ↗
Granted: Aug 18, 1992
Filed: Oct 23, 1990
Inventor
David F. Lewis
Assignee (at issue)
ISP INVESTMENTS LLC
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.