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:
Jan. 18, 2005
Filed:
Jul. 30, 2001
Applicants:
Steven B. Dawes, Corning, NY (US);
Michael T. Murtagh, Horseheads, NY (US);
Pushkar Tandon, Corning, NY (US);
Inventors:
Steven B. Dawes, Corning, NY (US);
Michael T. Murtagh, Horseheads, NY (US);
Pushkar Tandon, Corning, NY (US);
Assignee:
Corning Incorporated, Corning, NY (US);
Primary Examiner:
Int. Cl.
CPC ...
C03B 37018 ;
U.S. Cl.
CPC ...
Abstract
A method of making an optical waveguide preform includes forming a preform including a first portion and a second radial portion, wherein the second portion includes a dopant, and wherein the first portion exhibits a density greater than the second portion. The method further includes stripping at least a portion of the dopant from the second portion. In a preferred embodiment, the stripped dopant has migrated in a previous processing step.