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:
May. 01, 2018
Filed:
Oct. 29, 2012
Nippon Sheet Glass Company, Limited, Tokyo, JP;
Takashi Hisada, Tokyo, JP;
Kazuyuki Suzuki, Tokyo, JP;
Sachiko Nishikawa, Tokyo, JP;
Takashi Yokota, Tokyo, JP;
Nippon Sheet Glass Company, Limited, Tokyo, JP;
Abstract
A single glass panel for a fire door and a double glazed glass panel for a fire door that have a fireproofness with which the glass sheet passes an international standard ISO 0834 flame insulating performance test and are as inexpensive as possible. For example, the single glass panel for a fire door is obtained by forming a heat reflecting coating with a low emissivity on at least one surface of a glass sheet that is a heat strengthened glass sheet or is more thermally strengthened than a heat strengthened glass sheet, and the double glazed glass panel for a fire door includes a first glass sheet (B) obtained by forming a heat reflecting coating () with an emissivity of 0.07 or less on at least one surface of a glass sheet that is a heat strengthened glass sheet or is more thermally strengthened than a heat strengthened glass sheet and a second glass sheet (C) that is a heat strengthened glass sheet or is a glass sheet more thermally strengthened than a heat strengthened glass sheet, the first glass sheet (B) and the second glass sheet (C) being arranged to face each other with a gap therebetween such that at least one layer of said heat reflecting coating () is placed between the two glass sheets (B) and (C).