Granted Patent
Utility
US 5,473,053 · App. 08/178,869
Magenta poly-azo compounds
Inventors:
Ronald Wynford Kenyon, Prahalad Manibhai Mistry
Patented Case
View Patent ↗
Granted: Dec 5, 1995
Filed: Jan 7, 1994
Inventors
Ronald Wynford Kenyon
Prahalad Manibhai Mistry
Assignee (at issue)
Zeneca 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.