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:
Apr. 23, 2024
Filed:
Jun. 05, 2019
Applicant:
Rodenstock Gmbh, Munich, DE;
Inventors:
Assignee:
RODENSTOCK GMBH, , DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C09K 9/02 (2006.01); C09B 69/10 (2006.01); G02C 7/10 (2006.01);
U.S. Cl.
CPC ...
C09B 69/109 (2013.01); C09K 9/02 (2013.01); C09K 2211/1018 (2013.01); G02C 7/102 (2013.01);
Abstract
The present invention relates to new photochromic, fused naphthopyran systems having specific substituents R, which can be used to attain very rapid lightening speeds, without detriment to the depth of darkening after excitation, and also to the use thereof in plastics of all kinds.