Granted Patent
Utility
US 5,872,629 · App. 08/880,942
Analytical depth monitor utilizing differential interferometric analysis
Inventor:
Carl Colvard
Patented Case
View Patent ↗
Granted: Feb 16, 1999
Filed: Jun 23, 1997
Inventor
Carl Colvard
Assignee (at issue)
Charles Evans & Associates
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.