Granted Patent
Utility
US 4,999,271 · App. 07/298,221
Printing plate precursors
Inventors:
Terence Etherington, Keith Fletcher, Rodney M. Potts, John R. Wade
Patented Case
View Patent ↗
Granted: Mar 12, 1991
Filed: Jan 17, 1989
Inventors
Terence Etherington
Keith Fletcher
Rodney M. Potts
John R. Wade
Assignee (at issue)
Vickers PLC
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.