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:
Dec. 17, 2013
Filed:
Nov. 10, 2011
Steven E. Bowles, Pittsburgh, PA (US);
Cynthia Kutchko, Pittsburgh, PA (US);
Paul H. Lamers, Allison Park, PA (US);
Jason R. Lewis, Monaca, PA (US);
David E. Sartori, Pittsburgh, PA (US);
Robert W. Walters, Export, PA (US);
Feng Wang, Export, PA (US);
Steven E. Bowles, Pittsburgh, PA (US);
Cynthia Kutchko, Pittsburgh, PA (US);
Paul H. Lamers, Allison Park, PA (US);
Jason R. Lewis, Monaca, PA (US);
David E. Sartori, Pittsburgh, PA (US);
Robert W. Walters, Export, PA (US);
Feng Wang, Export, PA (US);
Transitions Optical, Inc., Pinellas Park, FL (US);
Abstract
The present invention provides a curable, organic polymeric photochromic composition comprising: a photochromic amount of at least one photochromic material; a polymeric polyol having carbonate groups along its backbone and having a number average molecular weight greater than 5000 g/mole; and a curing agent having reactive functional groups capable of reacting with hydroxyl groups on the polymeric polyol. After curing and after the Photochromic Performance Test the composition demonstrates a Tfade rate of less than 200 seconds. Also provided is a photochromic article comprising a rigid substrate and a photochromic organic polymeric coating applied to a surface of the substrate. The photochromic organic polymeric coating comprises the composition described above.