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. 19, 2004
Filed:
Mar. 07, 2003
Applicant:
Inventors:
Shigeo Furukawa, Moriguchi, JP;
Masahiro Hiraka, Ikoma, JP;
Shigeki Yamada, Kyoto, JP;
Yoshiki Higashiyama, Nara, JP;
Assignee:
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C03C 3/068 ; C03C 3/066 ;
U.S. Cl.
CPC ...
C03C 3/068 ; C03C 3/066 ;
Abstract
A mold lens glass including B O , SiO , La O , ZnO, BaO, and CaO, wherein the components in the composition are present in a weight ratio: of B O (25% to 35% by weight), SiO (1% to 7% by weight), wherein the total amount of B O and SiO is 30% to 40% by weight. La O is present in an amount of 12% to 20% by weight, and the total amount of ZnO, BaO and CaO is 40% to 55% by weight. By using the mold lens glass of the present invention, it is possible to obtain a mold lens glass having a high refractive index, excellent water resistance, and a stable glassy state.