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:
Aug. 23, 2022
Filed:
Aug. 16, 2019
Applicant:
Tokai Optical Co., Ltd., Okazaki, JP;
Inventors:
Assignee:
Tokai Optical Co., Ltd., Okazaki, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02B 1/04 (2006.01); G02B 1/14 (2015.01); G02B 1/115 (2015.01); G02C 7/02 (2006.01);
U.S. Cl.
CPC ...
G02B 1/041 (2013.01); G02B 1/14 (2015.01); G02B 1/115 (2013.01); G02C 7/02 (2013.01);
Abstract
A plastic spectacle lens includes at least a plastic base. In the plastic spectacle lens, a difference between a highest transmittance and a lowest transmittance for light in a range of wavelengths of not less than 400 nm and not greater than 780 nm, is not greater than 10 points, and an internal transmittance of the base for light in a range (visible range) of wavelengths of not less than 380 nm and not greater than 780 nm is not less than 80% over the entirety of the range of the wavelengths.