Granted Patent
Utility
US 5,602,237 · App. 08/412,670
1:2 metal complexes of polyazo dyes having a sulpho substituted 1-hydroxy-2-naphthyl group as the coupling component and their use as dyestuffs
Inventors:
Jordi B. Barra, Jose R. Sorolla
Patented Case
View Patent ↗
Granted: Feb 11, 1997
Filed: Mar 29, 1995
Inventors
Jordi B. Barra
Jose R. Sorolla
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.