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. 09, 2009
Filed:
Apr. 20, 2007
Applicants:
Manfred Melzig, Wessling, DE;
Yven Rohlfing, Munich, DE;
Udo Weigand, Munich, DE;
Inventors:
Assignee:
Rodenstock GmbH, Munich, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02B 5/23 (2006.01);
U.S. Cl.
CPC ...
Abstract
Photochromic h-annellated benzo[f]chromene compounds, especially photochromic compounds derived from benzo[f]chromenes, which compounds have particular long wavelength absorption maxima in their closed form and exhibit good performance in the open, colored form, so that good compatibility is achieved with indenonaphthopyrans which are diffused in phototropic glasses used in phototropic glass applications, and the use of such photochromic h-annellated benzo[f]chromene compounds in photochromic synthetic resin articles, particularly ophthalmic lenses.