Granted Patent
Utility
US 4,485,261 · App. 06/367,022
Process for producing methylamines
Inventors:
Yoshiro Ashina, Michio Fukatsu
Patented Case
View Patent ↗
Granted: Nov 27, 1984
Filed: Apr 9, 1982
Inventors
Yoshiro Ashina
Michio Fukatsu
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.