Granted Patent
Utility
US 4,032,452 · App. 05/631,841
Electrically regenerated ion exchange system
Inventor:
Thomas A. Davis
Patented Case
View Patent ↗
Granted: Jun 28, 1977
Filed: Nov 13, 1975
Inventor
Thomas A. Davis
Assignee (at issue)
Sybron 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.