Granted Patent
Utility
US 6,674,577 · App. 09/955,910
Optical element and method for recovering the substrate
Inventor:
Nikolay Slashchenko
Patented Case
View Patent ↗
Granted: Jan 6, 2004
Filed: Sep 19, 2001
Inventor
Nikolay Slashchenko
Assignee (at issue)
Carl Zeiss Stiftung
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.