Granted Patent
Utility
US 4,582,936 · App. 06/617,636
Process for producing dimethylamine in preference to mono- and trimethylamines by gas phase catalytic reaction of ammonia with methanol
Inventors:
Yoshiro Ashina, Takeyuki Fujita, Michio Fukatsu, Junsuke Yagi
Patented Case
View Patent ↗
Granted: Apr 15, 1986
Filed: Jun 6, 1984
Inventors
Yoshiro Ashina
Takeyuki Fujita
Michio Fukatsu
Junsuke Yagi
Assignee (at issue)
Nitto Kagaku Kogyo Kabushiki Kaisha
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.