Granted Patent
Utility
US 4,469,882 · App. 06/395,068
Process for the production of aromatic carbamates
Inventors:
Tsutomu Takeuchi, Mineo Nishi, Toshio Irie, Hirotaka Ryuto
Patented Case
View Patent ↗
Granted: Sep 4, 1984
Filed: Jun 23, 1982
Inventors
Tsutomu Takeuchi
Mineo Nishi
Toshio Irie
Hirotaka Ryuto
Assignee (at issue)
Mitsubishi Chemical Industries, 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.