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. 15, 2006
Filed:
Sep. 07, 2004
Shuichi Shibata, Ibaraki, JP;
Tetsuji Yano, Kanagawa, JP;
Jaeho Lee, Asan, KR;
Yuichi Kuroki, Kanagawa, JP;
Mikio Ueki, Hyogo, JP;
Shuichi Shibata, Ibaraki, JP;
Tetsuji Yano, Kanagawa, JP;
Jaeho Lee, Asan, KR;
Yuichi Kuroki, Kanagawa, JP;
Mikio Ueki, Hyogo, JP;
The Circle for the Promotion of Science and Engineering, Tokyo, JP;
Asahi Glass Company, Limited, Tokyo, JP;
Abstract
A glass funnel suitable for a chemical strengthening method of an electric field application type without impairing the safety of a cathode ray tube. A glass funnel for a cathode ray tube, characterized in that glass at a body portioncontains at least NaO and KO, the conductivity of said glass at the strain point is at least 4×10S/cm, the conductivity at 150° C. is at most 5×10S/cm, and a compressive stress layer is formed by a chemical strengthening method on at least part of the outer surface of the body portion