Granted Patent
Utility
US 6,797,326 · App. 10/065,363
Method of making polycrystalline diamond with working surfaces depleted of catalyzing material
Inventors:
Nigel Dennis Griffin, Peter Raymond Hughes
Patented Case
View Patent ↗
Granted: Sep 28, 2004
Filed: Oct 9, 2002
Inventors
Nigel Dennis Griffin
Peter Raymond Hughes
Assignee (at issue)
Reedhycalog UK Limited
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.