Stock material or miscellaneous articles – Composite – Of inorganic material
Reexamination Certificate
2008-04-15
2008-04-15
Shosho, Callie (Department: 1794)
Stock material or miscellaneous articles
Composite
Of inorganic material
C428S917000, C313S504000, C313S506000, C525S050000
Reexamination Certificate
active
07357990
ABSTRACT:
A method for producing a polymeric fluorescent substance characterized by comprising the step of contacting with an alkali a crude polymeric fluorescent substance that is fluorescent in a solid state and has a polystyrene equivalent number average molecular weight of 104to 108and one or more repeating units represented by the following formula (1):in-line-formulae description="In-line Formulae" end="lead"?—Ar1—(CR1═CR2)n— (1)in-line-formulae description="In-line Formulae" end="tail"?wherein Ar1is an arylene group or heterocyclic compound group that is unsubstituted or substituted by one or more substituents; R1and R2each independently represent a group selected from the group consisting of a hydrogen atom, an alkyl group, an aryl group, a heterocyclic compound group and a cyano group, in which the aryl group and the heterocyclic compound group is optionally substituted by another substituent; and n is 0 or 1.
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Doi Shuji
Noguchi Takanobu
Tsubata Yoshiaki
Shosho Callie
Sughrue & Mion, PLLC
Sumitomo Chemical Company Limited
Thompson Camie S
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