Granted Patent
Utility
US 5,041,645 · App. 07/282,909
Method for the preparation and recovery of alkali metal citrates
Inventors:
Alexander Alon, Philip W. Staal
Patented Case
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Granted: Aug 20, 1991
Filed: Dec 12, 1988
Inventors
Alexander Alon
Philip W. Staal
Assignee (at issue)
Haarmann & Reimer 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.