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:
Apr. 03, 2007
Filed:
Apr. 11, 2001
Applicants:
Yoshihisa Kusano, Koriyama, JP;
Atsuyuki Shimada, Koriyama, JP;
Toshiharu Hiraoka, Mitoyo-gun, JP;
Inventors:
Assignees:
Shin-Etsu Quartz Products Co., Ltd., Tokyo, JP;
Toyo Tanso Co., Ltd., Osaka-Fu, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B29C 33/76 (2006.01);
U.S. Cl.
CPC ...
Abstract
A mandrel for producing a large quartz glass body, comprising at least two columnar or cylindrical, carbon fiber-reinforced carbon composite members and joined in series by screw thread parts, wherein preferably the contact surface of the screw thread parts of the mandrel is impregnated and/or coated with carbon, and more preferably a reinforcing member made of a C/C composite is provided on the outer periphery of the screw thread parts.