Granted Patent
Utility
US 5,665,871 · App. 08/556,155
Mixtures of copper phthalocyanine and copper-containing azo dyes, their production and use
Inventor:
Reinhard Pedrazzi
Patented Case
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Granted: Sep 9, 1997
Filed: Nov 9, 1995
Inventor
Reinhard Pedrazzi
Assignee (at issue)
Clariant Finance (BVI) 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.