Granted Patent
Utility
US 5,608,111 · App. 08/435,607
Method of preparing 4-aminodiphenylamine
Inventors:
Michael K. Stern, James Malcolm Allman, James K. Bashkin, Roger Keranen Rains
Patented Case
View Patent ↗
Granted: Mar 4, 1997
Filed: May 5, 1995
Inventors
Michael K. Stern
James Malcolm Allman
James K. Bashkin
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.