Granted Patent
Utility
US 5,723,391 · App. 08/739,784
Silicon carbide gemstones
Inventors:
Charles Eric Hunter, Dirk Verbiest
Patented Case
View Patent ↗
Granted: Mar 3, 1998
Filed: Oct 30, 1996
Inventors
Charles Eric Hunter
Dirk Verbiest
Assignee (at issue)
C3 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.