Granted Patent
Utility
US 6,042,992 · App. 08/811,806
Bottom antireflective coatings through refractive index modification by anomalous dispersion
Inventors:
Ralph R. Dammel, Robert Norwood
Patented Case
View Patent ↗
Granted: Mar 28, 2000
Filed: Mar 6, 1997
Inventors
Ralph R. Dammel
Robert Norwood
Assignee (at issue)
Clariant Finance (BVI) 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.