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:
Jan. 25, 2000
Filed:
Dec. 30, 1996
Applicant:
Inventors:
Assignee:
Essilor International Compagnie Generale d'Optique, Charenton le Pont, FR;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02C / ; G02C / ; A61F / ;
U.S. Cl.
CPC ...
351161 ; 351163 ; 351164 ; 623-6 ;
Abstract
A multifocal artificial ocular lens has at least two corrective areas, namely a near vision area to correct near vision and a distance vision area to correct distance vision. The transparency of the lens varies in inverse proportion to its illumination. A photochromic substance is incorporated into the material of the lens, which improves optical performance. Applications include central near vision contact lenses.