Granted Patent
Utility
US 5,577,463 · App. 08/415,665
Extruded smectite clay clumping animal litter having improved clump strength
Inventors:
Carol Elazier-Davis, Gary W. Beall, John Hughes
Patented Case
View Patent ↗
Granted: Nov 26, 1996
Filed: Apr 3, 1995
Inventors
Carol Elazier-Davis
Gary W. Beall
John Hughes
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.