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:
Sep. 11, 2012
Filed:
Jul. 24, 2009
Applicants:
Mara Destro, Bologna, IT;
Dario Lazzari, Bologna, IT;
Dirk Simon, Lörrach-Brombach, DE;
Manuele Vitali, Bologna, IT;
Inventors:
Mara Destro, Bologna, IT;
Dario Lazzari, Bologna, IT;
Dirk Simon, Lörrach-Brombach, DE;
Manuele Vitali, Bologna, IT;
Assignee:
BASF SE, Ludwigshafen, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B 5/23 (2006.01); G02C 5/08 (2006.01); C07D 251/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
Photochromic compositions are disclosed comprising a polymeric material, a photochromic dye, a hydroxyphenyl triazine UV absorber and, optionally, a further light stabilizer selected from the sterically hindered amines. These systems provide a reversible photochromic effect and show improved light stabilization and color fastness.
Destro, Mara. (2012). Stabilization of photochromic systems (U.S. Patent No. 8262945). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/8262945
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile