Granted Patent
Utility
US 5,633,355 · App. 08/554,687
Monoazo disperse dyes from selected (aromatic amino)propionates or selected (aromatic amino)butyrates
Inventor:
Ruedi Altermatt
Patented Case
View Patent ↗
Granted: May 27, 1997
Filed: Nov 7, 1995
Inventor
Ruedi Altermatt
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.