Granted Patent
Utility
US 4,297,325 · App. 06/214,215
Method of producing pseudoboehmite from aluminum salt solutions
Inventors:
Julius Scherzer, Anh T. Liu, Yih-Yau Sun
Patented Case
View Patent ↗
Granted: Oct 27, 1981
Filed: Dec 8, 1980
Inventors
Julius Scherzer
Anh T. Liu
Yih-Yau Sun
Assignee (at issue)
Filtrol Corporation
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.