Stock material or miscellaneous articles – Composite – Of inorganic material
Reexamination Certificate
2007-11-20
2007-11-20
Truong, Duc (Department: 1711)
Stock material or miscellaneous articles
Composite
Of inorganic material
C428S917000, C313S504000, C257S040000, C257S103000, C528S486000, C528S489000
Reexamination Certificate
active
10480332
ABSTRACT:
A method for producing a polymeric fluorescent substance characterized by comprising the step of treating with an acid a polymeric fluorescent substance that is fluorescent in a solid state and has a polystyrene equivalent number average molecular weight of 1×104to 1×108. A method for producing a polymeric fluorescent substance characterized by comprising the steps of treating with an acid a polymeric fluorescent substance that is fluorescent in a solid state and has a polystyrene equivalent number average molecular weight of 1×104to 1×108and treating it with an alkali. A method for producing a polymeric fluorescent substance characterized by comprising the steps of treating with an acid a polymeric fluorescent substance that is fluorescent in a solid state and has a polystyrene equivalent number average molecular weight of 1×104to 1×108, treating it with an alkali and finally treating it with a substance that does not contain an acid or an alkali.
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Noguchi Takanobu
Ueda Masato
Sughrue & Mion, PLLC
Sumitomo Chemical Company Limited
Truong Duc
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