Granted Patent
Utility
US 4,876,025 · App. 07/191,724
Composition to absorb mercury
Inventor:
Richard H. Roydhouse
Patented Case
View Patent ↗
Granted: Oct 24, 1989
Filed: May 6, 1988
Inventor
Richard H. Roydhouse
Assignee (at issue)
EPS Environmental Protection Systems 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.