Granted Patent
Utility
US 6,402,916 · App. 09/502,796
Electrolytic process and apparatus controlled regeneration of modified ion exchangers to purify aqueous solutions and adjust ph
Inventors:
Richard L. Sampson, Allison H. Sampson
Patented Case
View Patent ↗
Granted: Jun 11, 2002
Filed: Feb 11, 2000
Inventors
Richard L. Sampson
Allison H. Sampson
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.