Granted Patent
Utility
US 5,972,542 · App. 09/062,024
Method of making a phase mask and mask for use in near-ultra-violet formation of refractive-index grating
Inventor:
Dmitry Starodubov
Patented Case
View Patent ↗
Granted: Oct 26, 1999
Filed: Apr 17, 1998
Inventor
Dmitry Starodubov
Assignee (at issue)
D-Star Technologies, Inc.
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.