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:
Jul. 13, 2010
Filed:
May. 20, 2005
Applicants:
Tetsuya Otosaka, Gunma-ken, JP;
Dai Inoue, Gunma-ken, JP;
Hiroshi Oyamada, Gunma-ken, JP;
Jun Abe, Gunma-ken, JP;
Hideo Hirasawa, Gunma-ken, JP;
Inventors:
Tetsuya Otosaka, Gunma-ken, JP;
Dai Inoue, Gunma-ken, JP;
Hiroshi Oyamada, Gunma-ken, JP;
Jun Abe, Gunma-ken, JP;
Hideo Hirasawa, Gunma-ken, JP;
Assignee:
Shin-Etsu Chemical Co., Ltd., Chiyoda-ku, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C03B 37/018 (2006.01);
U.S. Cl.
CPC ...
Abstract
A method for manufacturing a preform having a core and a multilayer clad, includes covering a circumference of a rod including at least the core and an inner clad layer with a first tube including at least a high viscosity clad layer, and unifying the rod and the first tube by heating and contracting the first tube.