Granted Patent
Utility
US 6,645,471 · App. 09/986,309
Composite abrasive material for oral compositions, and methods of making and using same
Inventors:
John Cornelius, Michel Martin
Patented Case
View Patent ↗
Granted: Nov 11, 2003
Filed: Nov 8, 2001
Inventors
John Cornelius
Michel Martin
Assignee (at issue)
J.M. Huber 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.