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:
Jul. 17, 2018
Filed:
Oct. 30, 2014
Applicant:
Nikon-essilor Co., Ltd., Tokyo, JP;
Inventors:
Yuka Takedomi, Tokyo, JP;
Yuko Kawamura, Tokyo, JP;
Assignee:
NIKON-ESSILOR CO., LTD., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
G02C 3/00 (2006.01); G02C 7/02 (2006.01); G02C 7/10 (2006.01); G02B 5/22 (2006.01); B29D 11/00 (2006.01);
U.S. Cl.
CPC ...
G02C 7/104 (2013.01); B29D 11/00923 (2013.01); G02B 5/223 (2013.01); G02C 7/10 (2013.01); G02C 7/108 (2013.01); G02C 2202/10 (2013.01);
Abstract
A functional dyed lens for spectacles is obtained by dyeing at least one of the surfaces of an undyed plastic lens, and in the functional dyed lens, a dyeing density defined as a difference in luminous transmittance from the undyed plastic lens is 2% or more but 4% or less, and a difference in average transmittance from the undyed plastic lens in a wavelength region of 530 nm to 570 nm is 3% or more but 5% or less.