Granted Patent
Utility
US 4,629,618 · App. 06/840,543
Boehmite
Inventors:
Yasuo Oguri, Junji Saito, Naoto Kijima
Patented Case
View Patent ↗
Granted: Dec 16, 1986
Filed: Mar 17, 1986
Inventors
Yasuo Oguri
Junji Saito
Naoto Kijima
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.