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:
Mar. 04, 2003
Filed:
Feb. 08, 1999
Applicant:
Inventors:
Assignee:
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C03C 3/087 ; C03C 3/091 ; H01J 1/324 ;
U.S. Cl.
CPC ...
C03C 3/087 ; C03C 3/091 ; H01J 1/324 ;
Abstract
For environmental protection, a glass composition for lamps that can suppress the consumption of mercury by the glass is provided. An embodiment of the glass composition consists essentially of, expressed in percentages by weight: SiO : 65-75, Al O : 0.5-4, Na O: 1-8, K O: 1-8, Li O: 0-2, MgO: 0.5-5, CaO: 1-8, SrO: 1-7, BaO: 3.5-7, B O : 0-3, Sb O : 0-1, Fe O : 0-0.2, TiO : 0-1, CeO : 0-1; and the total amount of Na O, K O and Li O is not more than 13 weight %. The glass composition is substantially free of lead.