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. 06, 1988
Filed:
Oct. 22, 1987
Applicant:
Inventors:
Mituo Kasori, Kawasaki, JP;
Hiroshi Imagawa, Yokohama, JP;
Hironori Maki, Kawasaki, JP;
Kenji Yagi, Yokohama, JP;
Osamu Kokubo, Sagamihara, JP;
Assignees:
Kabushiki Kaisha Toshiba, both of, JP;
Showa Electric Wire & Cable Co., Ltd., both of, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02B / ; G02B / ; C03C / ;
U.S. Cl.
CPC ...
350 9634 ; 350 9631 ; 501 59 ;
Abstract
A cladding glass for optical fiber comprises 60 to 80% by weight of silicon dioxide (SiO.sub.2), 0.5 to 10% by weight of aluminum oxide (Al.sub.2 O.sub.3), 9 to 17% by weight of an alkali metal oxide, 3 to 15% by weight of boron oxide (B.sub.2 O.sub.3) and more than 0 but not more than 3% by weight of fluorine (F). The cladding glass of this invention can simultaneously satisfy low refractive index and lowered viscosity, and is also excellent in water resistance and weathering resistance.