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:
Apr. 02, 2002
Filed:
Nov. 16, 2000
Applicant:
Inventors:
Thomas G. Havens, Painted Post, NY (US);
David J. Kerko, Corning, NY (US);
Brent M. Wedding, Corning, NY (US);
Assignee:
Corning SA, Avon Cedex, FR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C03C 1/900 ; C03C 2/100 ;
U.S. Cl.
CPC ...
C03C 1/900 ; C03C 2/100 ;
Abstract
An ophthalmic, protective, filter lens, and a method of producing such lens, the lens having a ratio of Z and Y tristimulus values between 0.25-0.40, a dominant wavelength between 570-580 nm. on a color mixture diagram, a sharp transmission drop between 450-500 nm. and a transmission not over 30% between 400-450 nm. The lens is produced by firing a silver halide-containing, photochromic glass lens in a hydrogen-containing atmosphere within a temperature range of 465° C. to 495° C. for less than 20 minutes.