Granted Patent
Utility
US 4,332,778 · App. 06/164,485
Non-evaporative process for the production of aluminum sulfate
Inventor:
Robert Hobday
Patented Case
View Patent ↗
Granted: Jun 1, 1982
Filed: Jun 30, 1980
Inventor
Robert Hobday
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.