Granted Patent
Utility
US 4,246,039 · App. 06/001,898
Kaolin clay processing
Inventor:
Robert B. Mixon, Jr.
Patented Case
View Patent ↗
Granted: Jan 20, 1981
Filed: Jan 8, 1979
Inventor
Robert B. Mixon, Jr.
Assignee (at issue)
Engelhard Minerals & Chemicals 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.