Granted Patent
Utility
US 5,753,029 · App. 08/763,569
Method for bleaching kaolin clay
Inventors:
George E. Gantt, Gerald D. Smith
Patented Case
View Patent ↗
Granted: May 19, 1998
Filed: Dec 10, 1996
Inventors
George E. Gantt
Gerald D. Smith
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.