Granted Patent
Utility
US 5,922,207 · App. 09/070,681
Filter aid for clay processing
Inventors:
Mitchell J. Willis, Sanjay Behl, Raymond H. Young
Patented Case
View Patent ↗
Granted: Jul 13, 1999
Filed: Apr 30, 1998
Inventors
Mitchell J. Willis
Sanjay Behl
Raymond H. Young
Assignee (at issue)
Engelhard 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.