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. 30, 2004
Filed:
May. 29, 2002
Applicant:
Inventors:
Shoichi Kishimoto, Osaka, JP;
Akihiro Koyama, Osaka, JP;
Hiroyuki Tanaka, Osaka, JP;
Nobuyuki Yamamoto, Osaka, JP;
Assignee:
Nippon Sheet Glass Co., Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C03C 3/087 ;
U.S. Cl.
CPC ...
C03C 3/087 ;
Abstract
A glass article of the present invention has a rate of dissolution in an acidic liquid of from 10 to 100 nm/min in terms of etching rate in immersing in a 0.1% by weight 50° C. aqueous solution of hydrofluoric acid and an average linear thermal expansion coefficient of 70×10 /° C. or higher as measured in the range of from −50° C. to 70° C., and the working temperature T (° C.) and the liquidus temperature T (° C.) thereof satisfy the relationship: T −T ≧−100° C.