Granted Patent
Utility
US 6,583,320 · App. 10/143,478
Process for preparing 4-aminodiphenylamine intermediates
Inventors:
Ralph Triplett, Roger Keranen Rains
Patented Case
View Patent ↗
Granted: Jun 24, 2003
Filed: May 10, 2002
Inventors
Ralph Triplett
Roger Keranen Rains
Assignee (at issue)
Flexsys America L.P.
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.