Granted Patent
Utility
US 4,331,525 · App. 06/190,632
Electrolytic-ultrafiltration apparatus and process for recovering solids from a liquid medium
Inventors:
Francis Huba, Roman Zorska
Patented Case
View Patent ↗
Granted: May 25, 1982
Filed: Sep 25, 1980
Inventors
Francis Huba
Roman Zorska
Assignee (at issue)
Diamond Shamrock 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.