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. 25, 2010
Filed:
Sep. 12, 2006
Jonathan N. G. Pillow, Cambridge, GB;
Michael Frampton, Oxford, GB;
Jonathan N. G. Pillow, Cambridge, GB;
Michael Frampton, Oxford, GB;
CDT Oxford Limited, Cambridgeshire, GB;
Abstract
A light emitting device comprising at least one compound of formula (I), (II) or (III) wherein Rand R, which may be the same or different, are organic substituents not including H, and wherein Rand Rare each independently selected from halo and organic substituents not including H, and wherein R, R, R, R, R, and Rare each independently selected from H, halo, and organic substituents, wherein any two or more of R, R, R, R, R, R, R, R, R, and Rmay optionally be fused together to form a ring system, provided that one of Rand Ris not part of a fused ring system, and provided that Rand Rare not fused to each other to form a ring system, and wherein one but not both of either (a) Rand R, or (b) Rand R, are fused to each other to form a ring system.