Granted Patent
Utility
US 6,716,780 · App. 09/962,843
Grey glass composition including erbium, holmium, and/or yttrium
Inventors:
Ksenia A. Landa, Leonid Landa, Anthony V. Longobardo, Scott V. Thomsen, David R. Hall
Patented Case
View Patent ↗
Granted: Apr 6, 2004
Filed: Sep 26, 2001
Inventors
Ksenia A. Landa
Leonid Landa
Anthony V. Longobardo
Scott V. Thomsen
David R. Hall
Assignee (at issue)
Guardian Industries Corp.
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.