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:
Aug. 07, 2012
Filed:
Aug. 08, 2008
Applicants:
Manfred Melzig, Wessling, DE;
Yven Rohlfing, Munich, DE;
Udo Weigand, Munich, DE;
Inventors:
Assignee:
Rodenstock GmbH, Munich, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C03C 4/00 (2006.01); G02B 5/23 (2006.01);
U.S. Cl.
CPC ...
Abstract
The present invention relates to photochromic benzopyranobenzopyrans with additional fusion and to the use thereof in plastics of all types, in particular for ophthalmic purposes. The compounds according to the invention are photochromic benzopyran compounds which can also be regarded as derived from 9-oxa-9,10-dihydrophenanthrene.
Quick Actions:
Melzig, Manfred. (2012). Photochromic benzopyrano-benzopyrans with further fusing (U.S. Patent No. 8236716). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/8236716
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile