The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 10, 2004
Filed:
Aug. 21, 2001
Mark T. Anderson, Woodbury, MN (US);
Craig R. Schardt, Saint Paul, MN (US);
James R. Onstott, Dresser, WI (US);
Lawrence J. Donalds, Mahtomedi, MN (US);
Alessandra O. Chiareli, Saint Paul, MN (US);
3M Innovative Properties Company, St. Paul, MN (US);
Abstract
An optical article including a core; at least one cladding layer; and a narrow fluorine reservoir between the core and the cladding layer. The fluorine reservoir has a higher concentration of fluorine than either the cladding layer or the core. One particular embodiment includes a core including a halide-doped silicate glass that comprises approximately the following in cation-plus-halide mole percent 0.25-5 mol % Al O , 0.05-1.5 mol % La O , 0.0005-0.75 mol % Er O , 0.5-6 mol % F, 0-1 mol % Cl.