Granted Patent
Utility
US 6,218,576 · App. 09/586,752
Process for producing a diarylamine
Inventors:
Taichi Shintou, Satoru Fujii, Shinji Kubo
Patented Case
View Patent ↗
Granted: Apr 17, 2001
Filed: Jun 5, 2000
Inventors
Taichi Shintou
Satoru Fujii
Shinji Kubo
Assignee (at issue)
SANKIO CHEMICAL CO., LTD.
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.