Granted Patent
Utility
US 6,375,914 · App. 09/509,345
Method for treating silica gel
Inventor:
Hakan Vangbo
Patented Case
View Patent ↗
Granted: Apr 23, 2002
Filed: Mar 27, 2000
Inventor
Hakan Vangbo
Assignee (at issue)
AB Carl Munters
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.