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. 29, 2003
Filed:
May. 13, 1999
Applicant:
Inventors:
Assignee:
Nippon Sheet Glass Co. LTD, Osaka, US;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B32B 3/02 ; B32B 2/302 ; B32B 7/02 ;
U.S. Cl.
CPC ...
B32B 3/02 ; B32B 2/302 ; B32B 7/02 ;
Abstract
A tempered glass sheet having a sufficient strength needed for a windowpane and can be utilized for smoothing a surface of the window is provided. A tempered glass sheet of the present invention, produced by tempering a glass sheet, has a stepped portion of reduced thickness relative to the thickness of the glass sheet in at least a part of a peripheral portion of the tempered glass sheet. By the stepped portion, a thin portion and a thick portion are formed. A difference in thickness between the thin portion and the thick portion is 0.5 mm or more, and the thickness of the thin portion is thicker than half the thickness of the thick portion.