Granted Patent
Utility
US 6,548,038 · App. 09/744,699
Process for the concentration of dilute sulphuric acid solutions
Inventor:
James H. Bush
Patented Case
View Patent ↗
Granted: Apr 15, 2003
Filed: Jan 29, 2001
Inventor
James H. Bush
Assignee (at issue)
Tioxide Group Services Limited
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.