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. 12, 1999
Filed:
Dec. 06, 1996
Applicant:
Inventors:
John M Evans, Fremont, CA (US);
Chun-Shen Lee, Cupertino, CA (US);
Praful C Doshi, Poway, CA (US);
Jerome A Legerton, Los Gatos, CA (US);
Assignee:
PBH, Inc., Des Plaines, IL (US);
Primary Examiner:
Int. Cl.
CPC ...
G02C / ;
U.S. Cl.
CPC ...
430321 ; 430-5 ; 351162 ; 351165 ; 351177 ;
Abstract
Methods for fabricating annular mask lens for vision correction having diffraction-reducing edges are provided. The lens body having an annular mask that forms a 'soft edge' by gradually decreasing the transmissivity radially from the center aperture to the annular mask area. The methods introduce varying levels of a coloring agent (e.g., dye) into certain portions of the lens.