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, 2020
Filed:
May. 23, 2017
Applicant:
Rodenstock Gmbh, München, DE;
Inventors:
Udo Weigand, München, DE;
Herbert Zinner, Rohrbach, DE;
Assignee:
RODENSTOCK GMBH, , DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C09B 57/00 (2006.01); G02B 1/04 (2006.01); G02B 5/23 (2006.01); C07D 293/04 (2006.01); C07D 493/14 (2006.01); C07D 495/04 (2006.01); C07D 493/04 (2006.01);
U.S. Cl.
CPC ...
C09B 57/00 (2013.01); C07D 493/04 (2013.01); C07D 493/14 (2013.01); C07D 495/04 (2013.01); G02B 1/041 (2013.01); G02B 5/23 (2013.01);
Abstract
The present invention relates to photochromic polyfused naphthopyrans having very long-wave absorption of the closed form extending well into the visible wavelength range, and to the use thereof in all kinds of plastics, especially for ophthalmic purposes, preferably in driving glasses.