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:
Nov. 30, 2021
Filed:
Sep. 28, 2017
Hoya Lens Thailand Ltd., Thanyaburi, TH;
Yuji Hoshi, Tokyo, JP;
HOYA LENS THAILAND LTD., Pathumthani, TH;
Abstract
Provided is a plastic lens obtained by curing a curable composition including a curable compound, wherein the curable composition includes 50 parts by mass or more of a (meth)acrylic curable compound relative to 100 parts by mass of the total amount of the curable compound, and in the plastic lens, the absorbance ratio of the maximum absorbance Abs1 at a wave number of 1680 to 1620 cmrelative to the maximum absorbance Abs2 at a wave number of 1800 to 1690 cmin an infrared spectrum obtained by measurement with a Fourier transform infrared spectrophotometer is 7.0% or less, as calculated by using the following Formula 1:Absorbance ratio (%)=(Abs1/Abs2)×100.