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. 16, 2008
Filed:
Jul. 30, 2004
Feng Wang, Export, PA (US);
Barry Van Gemert, Murrysville, PA (US);
Kevin J. Stewart, Murrysville, PA (US);
Carol L. Knox, Monroeville, PA (US);
Anu Chopra, Pittsburgh, PA (US);
Patrick M. Brown, Moon Township, PA (US);
Feng Wang, Export, PA (US);
Barry Van Gemert, Murrysville, PA (US);
Kevin J. Stewart, Murrysville, PA (US);
Carol L. Knox, Monroeville, PA (US);
Anu Chopra, Pittsburgh, PA (US);
Patrick M. Brown, Moon Township, PA (US);
PPG Industries Ohio, Inc., Cleveland, OH (US);
Abstract
Various non-limiting embodiments disclosed herein related to photochromic materials comprising the reaction product of (a) at least one ring-opening cyclic monomer, and (b) a photochromic initiator. Other non-limiting embodiments related to photochromic materials represented by: wherein S' comprises the at least one ring-opened cyclic monomer as set forth herein. Other non-limiting embodiments related to photochromic compositions, optical elements, and methods of inhibiting migration of a photochromic material in a polymeric material using the photochromic materials disclosed herein. Methods of making such photochromic materials, compositions, and optical elements are also disclosed.