Stock material or miscellaneous articles – Composite – Of inorganic material
Reexamination Certificate
2005-01-18
2005-01-18
Yamnitzky, Marie (Department: 1774)
Stock material or miscellaneous articles
Composite
Of inorganic material
C428S917000, C313S504000, C252S301160, C568S632000
Reexamination Certificate
active
06844088
ABSTRACT:
Bisphenylene-spirobifluorene compounds, a method for synthesizing the same, and EL material and device having the same. The bisphenylene-spirobifluorene compound is defined by the following formula:wherein R1and R2are identical or different and are independently a straight-chain or branched alkyl group having from 1 to 22 carbon atoms, X1and X2independently contains one or more elements selected from the group consisting of C, O, N, S, Si and Ge, and m and n are integers from 1 to 4.
REFERENCES:
patent: 5840217 (1998-11-01), Lupo et al.
patent: 11-273863 (1999-10-01), None
Chu Hye Yong
Do Lee-Mi
Kim Seong Hyun
Lee Hyo-young
Lee Jeong Ik
Blakely & Sokoloff, Taylor & Zafman
Electronics and Telecommunications Research Institute
Yamnitzky Marie
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