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. 04, 2025
Filed:
May. 31, 2019
Transitions Optical, Ltd., Tuam, IE;
Sandrine Guillermin, Tuam, IE;
Anil Kumar, Murrysville, PA (US);
Transitions Optical, Ltd., Tuam, IE;
Abstract
The present invention relates to optical articles that exhibit a uniform first transmittance when directly exposed to actinic radiation, such as sunlight; a gradient second percent transmittance when exposed to actinic radiation that has passed through an actinic radiation blocking or attenuating transparency (such as a vehicle windshield) interposed between the source of actinic radiation and the optical article; and a uniform third percent transmittance when free of exposure to actinic radiation. With the inventive optical articles, the uniform first percent transmittance is less than the uniform third percent transmittance. The present invention also relates to photochromic optical articles.