Granted Patent
Utility
US 4,328,102 · App. 06/206,545
Membrane apparatus having alternate opposite flow transverse to means flow
Inventors:
Brian J. Bellhouse, William S. Haworth
Patented Case
View Patent ↗
Granted: May 4, 1982
Filed: Jun 12, 1980
Inventors
Brian J. Bellhouse
William S. Haworth
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.