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:
Aug. 30, 2005
Filed:
May. 14, 2002
Applicants:
Katsuya Nagayama, Yokohama, JP;
Kazuya Kuwahara, Yokohama, JP;
Takayuki Shimazu, Yokohama, JP;
Inventors:
Assignee:
Sumitomo Electric Industries, Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C03B037/027 ;
U.S. Cl.
CPC ...
Abstract
The method of manufacturing an optical fiber in accordance with the present invention comprises a step of yielding an optical fiber by drawing an optical fiber preform softened upon heating, wherein a temperature at which the optical fiber preform is softened is at least 1800° C., whereas the optical fiber preform or optical fiber has a glass cooling rate of 4000° C./sec or less when attaining a temperature of 1800° C.