Granted Patent
Utility
US 4,339,415 · App. 06/213,273
Recovery of soluble alumina values from alumina bearing ores
Inventors:
John I. Choi, Bruce E. Kurtz, Anatoli Omelian
Patented Case
View Patent ↗
Granted: Jul 13, 1982
Filed: Dec 5, 1980
Inventors
John I. Choi
Bruce E. Kurtz
Anatoli Omelian
Assignee (at issue)
ALLIED CONSULTING, 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.