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. 30, 2025
Filed:
Oct. 25, 2021
Sumitomo Electric Industries, Ltd., Osaka, JP;
Fumiaki Sato, Osaka, JP;
Yuuki Shimoda, Osaka, JP;
Yohei Suzuki, Osaka, JP;
Hiroki Ishikawa, Osaka, JP;
SUMITOMO ELECTRIC INDUSTRIES, LTD., Osaka, JP;
Abstract
An optical fiber cable includes optical fiber ribbons and a sheath covering a periphery of the plurality of optical fiber ribbons. Each of the optical fiber ribbon includes optical fibers, and a connected portion and a non-connected portion are intermittently provided in the longitudinal direction. Each optical fiber includes a glass fiber and a coating portion. A ratio of an inner diameter to an outer diameter of the sheath is 0.75 or more. A ratio of a total area of glasses in an optical fiber ribbon accommodating portion to an area of the optical fiber ribbon accommodating portion is 15% or more and 25% or less, the number of the optical fibers in the optical fiber cable is 3000 or more, and the outer diameter of the sheath is 50 mm or less.