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. 20, 2004
Filed:
Dec. 06, 2001
Sachio Koizumi, Mobara, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A cathode ray tube has a cathode and plural grid electrodes fixed by insulating support rods. The cathode is supported within an eyelet disposed within and bonded to a cup-shaped support by a crystallized glass. The cup-shaped support is fixed by the insulating support rods. The crystallized glass is formed by firing a glass composition composed chiefly of zinc oxide, boron oxide, silicon oxide, and magnesium oxide. The crystallized glass exhibits a ratio in intensity of a diffraction peak A to a diffraction peak B in a range from 0.25 to 0.80 in an X-ray diffraction analysis using X-rays of 0.154 nm in wavelength, where the diffraction peak A is in the vicinity of 2&thgr;=25.5°, the diffraction peak B is in the vicinity of 2&thgr;=26.5°, 2&thgr;is an angle which a diffracted X-ray beam from a specimen surface makes with an incident X-ray beam.