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:
May. 12, 2015
Filed:
Dec. 08, 2011
Kevin E. Bancroft, Pittsburgh, PA (US);
Anu Chopra, Pittsburgh, PA (US);
Xiao-man Dai, Export, PA (US);
Beon-kyu Kim, Gibsonia, PA (US);
David B. Knowles, Apollo, PA (US);
Jason R. Lewis, Monaca, PA (US);
Victor A. Montes, Monroeville, PA (US);
Stephen D. Straight, Austin, TX (US);
Massimiliano Tomasulo, Monroeville, PA (US);
Barry Van Gemert, Delmont, PA (US);
Robert W. Walters, Export, PA (US);
Wenjing Xiao, Murrysville, PA (US);
Huayun Yu, Monroeville, PA (US);
Elizabeth A. Zezinka, Cranberry Township, County of Butler, PA (US);
Kevin E. Bancroft, Pittsburgh, PA (US);
Anu Chopra, Pittsburgh, PA (US);
Xiao-Man Dai, Export, PA (US);
Beon-Kyu Kim, Gibsonia, PA (US);
David B. Knowles, Apollo, PA (US);
Jason R. Lewis, Monaca, PA (US);
Victor A. Montes, Monroeville, PA (US);
Stephen D. Straight, Austin, TX (US);
Massimiliano Tomasulo, Monroeville, PA (US);
Barry Van Gemert, Delmont, PA (US);
Robert W. Walters, Export, PA (US);
Wenjing Xiao, Murrysville, PA (US);
Huayun Yu, Monroeville, PA (US);
Elizabeth A. Zezinka, Cranberry Township, County of Butler, PA (US);
Transitions Optical, Inc., Pinellas Park, FL (US);
Abstract
The present invention relates to photochromic materials that include one or more indeno-fused naphthopyrans that have particular groups at the 7, 11, and 13 positions thereof, and at the position alpha to the oxygen of the pyran ring thereof. With some embodiments, hydrogen or an alkoxy group is bonded to the 7 position, an optionally substituted phenyl is bonded to the 11 position, two alkyl groups are bonded to the 13 position, and two optionally substituted phenyl groups are bonded to the position alpha to the oxygen of the pyran ring of the indeno-fused naphthopyran compound. The 13 position of the indeno-fused naphthopyrans is free of ether groups in which an ether oxygen is bonded to the 13 position, and hydroxyl. The present invention also relates to photochromic articles and compositions that include such indeno-fused naphthopyrans.