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:
Dec. 27, 2005
Filed:
Aug. 26, 2002
Mari Ichimura, Kanagawa, JP;
Shinichiro Tamura, Kanagawa, JP;
Tadashi Ishibashi, Kanagawa, JP;
Ichinori Takada, Kanagawa, JP;
Mari Ichimura, Kanagawa, JP;
Shinichiro Tamura, Kanagawa, JP;
Tadashi Ishibashi, Kanagawa, JP;
Ichinori Takada, Kanagawa, JP;
Sony Corporation, Tokyo, JP;
Abstract
A diphosphonic acid ester of formula [VII] or [VII'] and a diphosphonium salt of formula [VIII] or [VIII′] are provided:wherein R, R, Rand Rmay be the same or different and independently represent an alkyl or alkenyl group having from 1 to 4 carbon atoms, a cyclohexyl group or a phenyl group, R, R, Rand Rmay be the same or different provided that at least three thereof are cyano groups and the others independently represent a hydrogen atom, a cyano group, a nitro group or a halogen atom, R, R, Rand Rmay be the same or different and independently represent a group selected from a hydrogen atom and a halogen atom provided that at least three thereof are fluorine atoms and X represents a halogen atom. These compounds are useful as synthetic intermediates for the preparation of luminescent bis(aminostyryl)benzene compounds.