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:
Sep. 19, 2023
Filed:
Oct. 11, 2017
Applicant:
Nippon Sheet Glass Company, Limited, Tokyo, JP;
Inventors:
Aya Nakamura, Hyogo, JP;
Masanori Shojiya, Hyogo, JP;
Assignee:
NIPPON SHEET GLASS COMPANY, LIMITED, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
C03C 3/085 (2006.01); C03C 13/00 (2006.01); C03C 12/00 (2006.01); C03C 3/087 (2006.01); C03C 3/091 (2006.01); C08J 5/04 (2006.01); D01F 9/08 (2006.01);
U.S. Cl.
CPC ...
C03C 3/085 (2013.01); C03C 3/087 (2013.01); C03C 3/091 (2013.01); C03C 12/00 (2013.01); C03C 13/00 (2013.01); C08J 5/042 (2013.01); D01F 9/08 (2013.01);
Abstract
The present invention provides a glass composition not requiring a large quantity of rare earth material, producible by a common apparatus for producing a glass, having a high Young's modulus and a large crack initiation load, and suitable for glass fibers etc. A glass composition according to the present invention contains, in mol %: 50 to 65% SiO; 7.5 to 26% AlO; 15 to 30% MgO; 0 to 8% CaO; 0 to 3% BO; 0 to 3% LiO; and 0 to 0.2% NaO. In this glass composition, a total content of MgO and CaO is in a range of 18 to 35 mol %, and a mol ratio calculated by AlO/(MgO+CaO) is less than 1.