Granted Patent
Utility
US 6,235,162 · App. 09/085,988
Ultrapure hydroxylamine compound solutions and process of making same
Inventors:
Hossein Sharifian, John William Drew
Patented Case
View Patent ↗
Granted: May 22, 2001
Filed: May 28, 1998
Inventors
Hossein Sharifian
John William Drew
Assignee (at issue)
SACHEM, INC.
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.