Granted Patent
Utility
US 4,472,532 · App. 06/445,304
Preparative process for alkaline earth metal, aluminum-containing spinels
Inventor:
John Mooi
Patented Case
View Patent ↗
Granted: Sep 18, 1984
Filed: Nov 29, 1982
Inventor
John Mooi
Assignee (at issue)
Atlantic Richfield Company
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.