Granted Patent
Utility
US 6,783,802 · App. 10/254,734
Hydraulic barrier
Inventors:
Jerald W. Darlington, Jr., Natalie A. Dotlich, Craig M. Mattern, Richard Carriker, Mark Clarey
Patented Case
View Patent ↗
Granted: Aug 31, 2004
Filed: Sep 25, 2002
Inventors
Jerald W. Darlington, Jr.
Natalie A. Dotlich
Craig M. Mattern
Richard Carriker
Mark Clarey
Assignee (at issue)
AMCOL INTERNATIONAL CORPORATION
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.