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:
Jan. 27, 1998
Filed:
Jun. 28, 1995
Roland Stern, Wiesbaden, DE;
Donald Lupo, Frankfurt am Main, DE;
Josef Salbeck, Kelkheim, DE;
Hermann Schenk, Hofheim, DE;
Thomas Stehlin, Kriftel, DE;
Klaus Mullen, Mainz, DE;
Ullrich Scherf, Mainz-Kastel, DE;
Joachim Huber, Ingelheim, DE;
Hoechst Aktiengesellschaft, Frankfurt, DE;
Abstract
Conjugated polymers containing ansa substructures and their use as electroluminescence materials. Conjugated polymers containing ansa substructures, which contain aromatic groups and in which adjacent aromatic groups are connected to one another in such a way that one ring atom of one aromatic group is directly linked to one ring atom of the other aromatic group and any further linkages of these two aromatic groups are possible only via a bridge containing at least one tetravalent carbon atom and/or heteroatom. The polymers of the invention having ansa substructures are outstandingly suitable as electroluminescence materials, since they have a very high color purity.