Granted Patent
Utility
US 6,690,868 · App. 09/934,388
Optical waveguide article including a fluorine-containing zone
Inventors:
Mark T. Anderson, Craig R. Schardt, James Onstott, Lawrence J. Donalds, Alessandra Chiareli
Patented Case
View Patent ↗
Granted: Feb 10, 2004
Filed: Aug 21, 2001
Inventors
Mark T. Anderson
Craig R. Schardt
James Onstott
Lawrence J. Donalds
Alessandra Chiareli
Assignee (at issue)
3M INNOVATIVE PROPERTIES COMPANY
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.