Granted Patent
Utility
US 4,869,882 · App. 07/139,448
Recovery of sodium carbonate values from contaminated dilute soda ash streams
Inventors:
Ernest M. Dome, Joel Baker, Thanassi E. Fakatselis
Patented Case
View Patent ↗
Granted: Sep 26, 1989
Filed: Dec 30, 1987
Inventors
Ernest M. Dome
Joel Baker
Thanassi E. Fakatselis
Assignee (at issue)
General 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.