Granted Patent
Utility
US 5,338,530 · App. 07/612,660
Recovery of glycine and Glauber's salt from waste crystal liquors
Inventor:
Jon C. Thunberg
Patented Case
View Patent ↗
Granted: Aug 16, 1994
Filed: Nov 9, 1990
Inventor
Jon C. Thunberg
Assignee (at issue)
Hampshire Chemical Corp.
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.