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:
May. 15, 1990
Filed:
Jan. 23, 1989
Applicant:
Inventors:
Yoshinori Mimura, Wako, JP;
Yukio Noda, Saitama, JP;
Naoki Norimatsu, Tokyo, JP;
Hideharu Tokiwa, Yono, JP;
Osamu Shinbori, Tokyo, JP;
Assignee:
Kokusai Denshin Denwa Kabushiki Kaisha, Tokyo, JP;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
C03B / ; C03C / ;
U.S. Cl.
CPC ...
65 48 ; 65 23 ; 65 39 ; 65152 ; 65153 ;
Abstract
A method and an apparatus for manufacturing a fluoride glass fiber preform are disclosed which preclude the step of pouring a glass melt into a mold from a crucible, and hence permit the fabrication of a long, homogeneous fluoride glass fiber preform free from foreign substances and air bubbles leading to scattering and which also allow ease in the fabrication of a preform having an elliptic core portion for drawing a polarized wave retaining fiber.