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:
Sep. 14, 2021
Filed:
Dec. 10, 2013
Applicant:
Draka Comteq B.v., Amsterdam, NL;
Inventors:
Igor Milicevic, Helmond, NL;
Mattheus Jacobus Nicolaas Van Stralen, Tilburg, NL;
Johannes Antoon Hartsuiker, Eindhoven, NL;
Assignee:
DRAKA COMTEQ B.V., Amsterdam, NL;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C03B 37/018 (2006.01);
U.S. Cl.
CPC ...
C03B 37/018 (2013.01); C03B 37/0183 (2013.01); C03C 2218/33 (2013.01);
Abstract
A method for activating an inner surface of a hollow glass substrate tube for manufacturing an optical fiber preform including depositing a plurality of activation glass layers on the inner surface of the hollow substrate tube by a PCVD process, wherein a total thickness of the deposited activation glass layers is between 10 microns and 250 microns, and etching the deposited activation glass layers to remove at least 30% of the deposited activation glass layers.