Granted Patent
Utility
US 4,312,593 · App. 06/106,252
Direct readout apparatus for measuring light transmitted through liquids
Inventors:
William Brent Baker, Joe T. May
Patented Case
View Patent ↗
Granted: Jan 26, 1982
Filed: Dec 21, 1979
Inventors
William Brent Baker
Joe T. May
Assignee (at issue)
E.I. DU PONT DE NEMOURS AND COMPANY
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.