Granted Patent
Utility
US 6,130,179 · App. 09/190,528
Purified attapulgite clay
Inventors:
Paul Sampson, Dennis Parker, David L. Ruff
Patented Case
View Patent ↗
Granted: Oct 10, 2000
Filed: Nov 12, 1998
Inventors
Paul Sampson
Dennis Parker
David L. Ruff
Assignee (at issue)
ITC 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.