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:
Oct. 18, 2011
Filed:
Mar. 13, 2009
Applicants:
Kenji Imakita, Tokyo, JP;
Naoki Sugimoto, Tokyo, JP;
Inventors:
Kenji Imakita, Tokyo, JP;
Naoki Sugimoto, Tokyo, JP;
Assignee:
Asahi Glass Company, Limited, Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C03C 3/068 (2006.01); C03C 3/095 (2006.01); C03C 3/091 (2006.01);
U.S. Cl.
CPC ...
Abstract
The present invention has an object to provide an optical glass which has middle refractive index and low dispersibility, a low yield point (T) and a liquidus temperature (L.T.) and excellent weather resistance, and is suitable for mold press molding. The present invention relates to an optical glass comprising, in mass % on oxide basis, SiO: 20 to 40%, BO: 10 to 30%, SrO: 10 to 30%, AlO: 5.5 to 15%, LaO: 0.5 to 11%, LiO: 3 to 12%, CaO: 0 to 10%, BaO: 0 to 9.5%, and ZnO: 0 to 10%.