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:
Jun. 12, 2007
Filed:
Sep. 21, 2004
Applicants:
Claudia Mann, Munich, DE;
Manfred Melzig, Wessling, DE;
Udo Weigand, Munich, DE;
Inventors:
Assignee:
Rodenstock GmbH, Munich, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
A61K 31/541 (2006.01); A61K 31/5365 (2006.01); A61K 31/5383 (2006.01); C07D 221/18 (2006.01); C07D 265/34 (2006.01);
U.S. Cl.
CPC ...
Abstract
Photochromic 3H-naphtho[2,1-b]pyran compounds corresponding to formula I in which the groups Rto Rand B' have defined meanings and the use of such photochromic compounds in synthetic resin articles of all types, particularly for ophthalmic purposes. The photochromic 3H-naphtho[2,1-b]pyran derivatives have particularly long-waved absorption maxima in the open form, and when used in photochromic eyeglass lenses, produce essentially blue color tones which have a high darkening capacity.