Granted Patent
Utility
US 4,577,948 · App. 06/543,919
Method and apparatus for controlling the processing of radiation sensitive plates with a liquid by monitoring the electrical conductivity of the liquid
Inventors:
Leslie E. Lawson, Michael Ingham
Patented Case
View Patent ↗
Granted: Mar 25, 1986
Filed: Oct 20, 1983
Inventors
Leslie E. Lawson
Michael Ingham
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.