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. 13, 2015
Filed:
Dec. 21, 2011
Applicants:
Manfred Melzig, Wessling, DE;
Yven Rohlfing, München, DE;
Udo Weigand, München, DE;
Inventors:
Assignee:
Rodenstock GmbH, München, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07D 223/14 (2006.01); C07D 221/18 (2006.01); G02B 5/23 (2006.01); C07D 311/92 (2006.01);
U.S. Cl.
CPC ...
G02B 5/23 (2013.01); C07D 311/92 (2013.01);
Abstract
The present invention relates to photochromic fused naphthopyrans having a benzene ring which is adjacent to the pyran oxygen and is linked to the para substituent via both meta positions, and to the use thereof in plastics of all types, in particular for ophthalmic purposes.