Granted Patent
Utility
US 4,592,901 · App. 06/647,981
Method of removing suspended solids from phosphoric acid
Inventors:
Hudson C. Smith, Wesley W. Atwood, John S. Myrick, Samuel F. Sweat
Patented Case
View Patent ↗
Granted: Jun 3, 1986
Filed: Sep 6, 1984
Inventors
Hudson C. Smith
Wesley W. Atwood
John S. Myrick
Samuel F. Sweat
Assignee (at issue)
Occidental Petroleum
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.