Granted Patent
Utility
US 4,916,769 · App. 07/319,185
Disperse mono-azo dye mixture for dyeing synthetic textiles
Inventors:
David Brierley, Leslie A. Mather, Barry Huston Meyrick
Patented Case
View Patent ↗
Granted: Apr 17, 1990
Filed: Mar 6, 1989
Inventors
David Brierley
Leslie A. Mather
Barry Huston Meyrick
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.