Granted Patent
Utility
US 4,780,106 · App. 07/061,076
Use of metal-free azo _compounds having at least one _6-hydroxypyrid-2-one _coupling component radical and metal _complexes thereof for dyeing _substrates and substrates dyed therewith
Inventors:
Helmut Moser, Manfred Greve, Reinhard Pedrazzi, Roland Wald
Patented Case
View Patent ↗
Granted: Oct 25, 1988
Filed: Jun 10, 1987
Inventors
Helmut Moser
Manfred Greve
Reinhard Pedrazzi
Roland Wald
Assignee (at issue)
Sandoz AG
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.