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. 16, 2002
Filed:
Jul. 11, 2000
Applicant:
Inventors:
Assignee:
Optische Werke G. Rodenstock, Munich, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02F 1/01 ; G02B 5/22 ; G02B 5/23 ; G02C 7/02 ; G02C 7/10 ; F21V 9/100 ;
U.S. Cl.
CPC ...
G02F 1/01 ; G02B 5/22 ; G02B 5/23 ; G02C 7/02 ; G02C 7/10 ; F21V 9/100 ;
Abstract
A neutral-colored gray photochromic plastic article which remains almost completely color-neutral or gray both during darkening as well as during bleaching. The plastic article according to the invention may be employed as a neutral-color gray photochromic ophthalmic lens.