Granted Patent
Utility
US 4,900,812 · App. 07/149,813
Sulfo group-containing metal phlhalocyanine azo compound having a 6-hydroxypyrid-2-one coupling component radicals having a fiber-reactive group
Inventors:
Helmut Moser, Roland Wald
Patented Case
View Patent ↗
Granted: Feb 13, 1990
Filed: Jan 29, 1988
Inventors
Helmut Moser
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.