Granted Patent
Utility
US 5,545,752 · App. 08/458,294
Process for the preparation of diphenylamine or nucleus-substituted derivative thereof
Inventors:
Teruyuki Nagata, Chiyuki Kusuda, Masaru Wada
Patented Case
View Patent ↗
Granted: Aug 13, 1996
Filed: Jun 2, 1995
Inventors
Teruyuki Nagata
Chiyuki Kusuda
Masaru Wada
Assignee (at issue)
Mitsui Toatsu Chemicals, Incorporated
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.