Granted Patent
Utility
US 4,698,296 · App. 06/839,390
Processless color imaging and film therefor
Inventor:
David F. Lewis
Patented Case
View Patent ↗
Granted: Oct 6, 1987
Filed: Mar 14, 1986
Inventor
David F. Lewis
Assignee (at issue)
GAF 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.