Granted Patent
Utility
US 4,376,047 · App. 06/275,109
Coated resin ion exchange composition
Inventor:
Christopher A. Pohl
Patented Case
View Patent ↗
Granted: Mar 8, 1983
Filed: Jun 18, 1981
Inventor
Christopher A. Pohl
Assignee (at issue)
Dionex 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.