Granted Patent
Utility
US 5,993,533 · App. 09/110,046
Continuous wet treatment process to prepare durable, high gloss titanium dioxide pigment
Inventors:
Michael Diebold, Charles Robert Bettler, Phillip Martin Niedenzu, Anhtony John Coombe, John Phillip Lanci, Sr.
Patented Case
View Patent ↗
Granted: Nov 30, 1999
Filed: Jul 2, 1998
Inventors
Michael Diebold
Charles Robert Bettler
Phillip Martin Niedenzu
Anhtony John Coombe
John Phillip Lanci, Sr.
Assignee (at issue)
E.I. DU PONT DE NEMOURS AND COMPANY
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.