Granted Patent
Utility
US 6,585,822 · App. 09/755,259
Kaolin clay glossing pigment and preparation thereof
Inventors:
Richard Berube, Michael G. Londo, Sathanjheri A. Ravishankar
Patented Case
View Patent ↗
Granted: Jul 1, 2003
Filed: Jan 5, 2001
Inventors
Richard Berube
Michael G. Londo
Sathanjheri A. Ravishankar
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.