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:
Dec. 18, 2018
Filed:
Feb. 28, 2018
Applicant:
Asahi Glass Company, Limited, Chiyoda-ku, JP;
Inventors:
Ikuo Nagasawa, Chiyoda-ku, JP;
Jun Ito, Chiyoda-ku, JP;
Assignee:
AGC Inc., Chiyoda-ku, JP;
Primary Examiner:
Int. Cl.
CPC ...
C03B 33/095 (2006.01); C03C 21/00 (2006.01); C03C 23/00 (2006.01); B23K 26/55 (2014.01); F16L 9/10 (2006.01);
U.S. Cl.
CPC ...
C03B 33/0955 (2013.01); B23K 26/55 (2015.10); C03B 33/095 (2013.01); C03C 21/00 (2013.01); C03C 21/002 (2013.01); C03C 23/00 (2013.01); C03C 23/0025 (2013.01); F16L 9/105 (2013.01);
Abstract
A glass tube production method includes (1) preparing a tubular glass material, (2) irradiating an outer main surface of the tubular glass material with a laser to form an in-plane void region having a plurality of voids arranged on the outer main surface, and forming a plurality of internal void rows each having one void or two or more voids arranged from the in-plane void region toward an inner main surface of the tubular glass material, and (3) chemically strengthening the tubular glass material having the internal void rows formed therein.