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:
Mar. 11, 2025
Filed:
Dec. 21, 2018
Transitions Optical, Ltd., Tuam, IE;
Ryan Stayshich, Pittsburgh, PA (US);
Zachary Smith, Pittsburgh, PA (US);
Robert W. Walters, Murrysville, PA (US);
Transitions Optical, Ltd., Tuam, IE;
Abstract
Provided is an article which transitions from a first state to a second state in response to actinic radiation. The article includes an indolenaphthopyran, wherein in the first state the article exhibits a percent transmission of greater than 80 percent, and in the second state the article exhibits a percent transmission of between 35 and 75 percent, and a τvalue of less than 20 percent. The article can be a photochromic article selected from ophthalmic articles, display articles, windows, mirrors, active liquid crystal cell articles, and passive liquid crystal cell articles.