Granted Patent
Utility
US 5,674,176 · App. 08/726,622
Method for treatment of solid waste to minimize heavy metals
Inventor:
Sherry A. Pierce
Patented Case
View Patent ↗
Granted: Oct 7, 1997
Filed: Oct 7, 1996
Inventor
Sherry A. Pierce
Assignee (at issue)
ENTACT, LLC
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.