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:
Jun. 02, 1998
Filed:
Mar. 02, 1995
Shuji Doi, Tsukuba, JP;
Takanobu Noguchi, Tsukuba, JP;
Toshihiro Ohnishi, Tsukuba, JP;
Masamitsu Ishitobi, Tsukuba, JP;
Sumitomo Chemical Company, Limited, Osaka, JP;
Abstract
An organic electroluminescence device having at least a light emitting layer between the electrodes consisting of one pair of an anode and a cathode, at least one of which electrodes is transparent or semi-transparent, wherein said light emitting layer comprises a polymeric fluorescent substance which emits a fluorescence in a solid state, is soluble in solvents and comprises at least one kind of repeating unit represented by the following formula (1) and at least one kind of repeating unit represented by the following formula (2) with the number of the formula (1) repeating units being 2-50% of the total number of all the repeating units: