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:
Jan. 23, 2007
Filed:
Mar. 20, 2003
Anil Kumar, Allegheny County, PA (US);
Michael S. Misura, Westmoreland County, PA (US);
Robert W. Walters, Westmoreland County, PA (US);
Barry Van Gemert, Westmoreland County, PA (US);
Anu Chopra, Allegheny County, PA (US);
Clara E. Nelson, Allegheny County, PA (US);
Anil Kumar, Allegheny County, PA (US);
Michael S. Misura, Westmoreland County, PA (US);
Robert W. Walters, Westmoreland County, PA (US);
Barry Van Gemert, Westmoreland County, PA (US);
Anu Chopra, Allegheny County, PA (US);
Clara E. Nelson, Allegheny County, PA (US);
Transitions Optical, Inc., Pinellas Park, FL (US);
Abstract
Described are photochromic articles that include a substrate and a photochromic amount of at least one organic photochromic material (b) represented by graphic formula XIII adapted to change from an unactivated state to an activated state by exposure to radiation substantially in a wavelength range from 380 to 410 nanometers (nm) when measured over a wavelength range of from 380 to 700 nm. The photochromic articles demonstrate a photochromic response when activated behind an ultraviolet blocking transparency such as an automotive windshield. For example, the photochromic articles retain at least 12 percent of the activation measured as change in optical density or delta OD under outdoor simulating conditions in the Outdoor Test when tested under conditions simulating an eyeglass wearer behind an automotive windshield in the Behind the Windshield Test. Methods for producing the aforedescribed photochromic articles are also described.