Granted Patent
Utility
US 5,498,701 · App. 08/363,672
Basic disazo compounds containing sulphonic acid groups
Inventor:
Reinhard Pedrazzi
Patented Case
View Patent ↗
Granted: Mar 12, 1996
Filed: Dec 22, 1994
Inventor
Reinhard Pedrazzi
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.