Granted Patent
Utility
US 6,008,331 · App. 09/142,635
Disazo compounds containing a piperazinylethysulfonyl group
Inventors:
Peter Gregory, Ronald Wynford Kenyon, Paul Wight
Patented Case
View Patent ↗
Granted: Dec 28, 1999
Filed: Apr 21, 1999
Inventors
Peter Gregory
Ronald Wynford Kenyon
Paul Wight
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.