Granted Patent
Utility
US 4,563,340 · App. 06/544,625
Process for the secondary obtention of sodium carbonate from FLP waste liquor
Inventor:
Jose Polendo-Loredo
Patented Case
View Patent ↗
Granted: Jan 7, 1986
Filed: Oct 24, 1983
Inventor
Jose Polendo-Loredo
Assignee (at issue)
Industria del Alcali, S.A.
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.