Granted Patent
Utility
US 4,260,591 · App. 05/972,097
Process for preparing alkali metal aluminum phosphate
Inventors:
Robert E. Benjamin, Thomas E. Edging
Patented Case
View Patent ↗
Granted: Apr 7, 1981
Filed: Dec 21, 1978
Inventors
Robert E. Benjamin
Thomas E. Edging
Assignee (at issue)
Stauffer Chemical 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.