Granted Patent
Utility
US 5,075,007 · App. 07/528,508
Biological wastewater purification with a downstream precipitation stage
Inventors:
Manfred Morper, Wolfgang Reiser
Patented Case
View Patent ↗
Granted: Dec 24, 1991
Filed: May 25, 1990
Inventors
Manfred Morper
Wolfgang Reiser
Assignee (at issue)
Linde GmbH
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.