Granted Patent
Utility
US 6,767,455 · App. 10/261,107
Airlift membrane device and membrane bioreactor and bioreactor process containing same
Inventor:
Robert L. Goldsmith
Patented Case
View Patent ↗
Granted: Jul 27, 2004
Filed: Sep 30, 2002
Inventor
Robert L. Goldsmith
Assignee (at issue)
Ceramem 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.