Granted Patent
Utility
US 5,959,150 · App. 08/426,653
Process for preparing methylamines
Inventors:
Tadamitsu Kiyoura, Shigeki Nakahara
Patented Case
View Patent ↗
Granted: Sep 28, 1999
Filed: Apr 21, 1995
Inventors
Tadamitsu Kiyoura
Shigeki Nakahara
Assignee (at issue)
MITSUI CHEMICALS, INC.
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.