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. 13, 1983
Filed:
Dec. 01, 1982
Applicant:
Inventor:
Jean E Boudot, Avon, FR;
Assignee:
Corning Glass Works, Corning, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C03C / ;
U.S. Cl.
CPC ...
501 78 ; 501 79 ; 501903 ;
Abstract
This invention relates to the production of glasses especially suitable for ophthalmic lenses, the glasses exhibiting refractive indices between about 1.695-1.705, dispersive indices between about 40.5-43.2, densities below about 3.2 g/cm.sup.3, weight losses as measured in the AO test of less than 0.15 mg/cm.sup.2, transmittances at 400 nm in 10 mm thickness of at least 75%, and consisting essentially, in weight percent of