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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.:

US 11048040 B1

PDFFull Text
Date of Patent:
Jun. 29, 2021

Filed:

Apr. 15, 2020

Optical fiber

Applicant:

Sumitomo Electric Industries, Ltd., Osaka, JP;

Inventors:

Hirotaka Sakuma, Osaka, JP;

Yoshiaki Tamura, Osaka, JP;

Keisei Morita, Osaka, JP;

Yuki Kawaguchi, Osaka, JP;

Assignee:

SUMITOMO ELECTRIC INDUSTRIES, LTD., Osaka, JP;

Attorney:

Faegre Drinker Biddle & Reath LLP

Primary Examiner:

Michael P Mooney

Int. Cl.
CPC ...
G02B 6/036 (2006.01); G02B 6/02 (2006.01); G02B 6/028 (2006.01); C03C 13/04 (2006.01); C03C 3/06 (2006.01); C03B 37/014 (2006.01);
U.S. Cl.
CPC ...
G02B 6/036 (2013.01); C03B 37/014 (2013.01); C03B 37/01446 (2013.01); C03C 3/06 (2013.01); C03C 13/04 (2013.01); C03C 13/045 (2013.01); C03C 13/046 (2013.01); G02B 6/02 (2013.01); G02B 6/02009 (2013.01); G02B 6/0281 (2013.01); G02B 6/02266 (2013.01); G02B 6/03694 (2013.01);
Abstract

The optical fiber offered is capable of not only restraining the attenuation due to glass defects, but also reducing the increase of manufacturing cost. The optical fiber is made of silica glass and includes a core and a cladding. The cladding encloses the core and has a refractive index smaller than that of the core. When the core is divided into inner core and outer core at half of the radius of the core, the average chlorine concentration of the inner core is larger than that of the outer core. The core includes any of the alkali metal group.

Find Patent Forward Citations

Sakuma, Hirotaka. (2021). Optical fiber (U.S. Patent No. 11048040). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/11048040

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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