Granted Patent
Utility
US 4,207,183 · App. 05/904,981
Prevention of solute deposition fouling in membrane processes
Inventor:
Howard R. Herrigel
Patented Case
View Patent ↗
Granted: Jun 10, 1980
Filed: May 11, 1978
Inventor
Howard R. Herrigel
Assignee (at issue)
Resources Conservation, Inc.
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.