Granted Patent
Utility
US 4,615,820 · App. 06/785,027
Detergent compositions
Inventors:
Paul Steabben Hepworth, Roger I. Hancock
Patented Case
View Patent ↗
Granted: Oct 7, 1986
Filed: Oct 7, 1985
Inventors
Paul Steabben Hepworth
Roger I. Hancock
Assignee (at issue)
IMPERIAL CHEMICAL INDUSTRIES LIMITED
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.