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. 10, 1989
Filed:
Sep. 12, 1986
Applicant:
Inventors:
Maurice Dufour, Paris, FR;
Gerard Obrecht, Issy Les Moulineaux, FR;
Assignee:
Essilor International Compagnie Generale d'Optique, Creteil, FR;
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02C / ;
U.S. Cl.
CPC ...
351169 ; 351171 ;
Abstract
A progressive lens with a continuous surface comprises three substantially constant power areas. A first such area is mathced to far vision, a second to near vision and a third, between the first and second areas, to intermediate vision. Respective progressively varying power areas lie between the first and third areas and between the third and second areas. A predetermined progress meridian passing through these substantially constant power areas may have substantially umbilical parts between the substantially constant power areas.