Polyfluorenes as materials for photoluminescence and electroluminescence
Patent 5900327 Issued on May 4, 1999. Estimated Expiration Date: 
November 5, 2017. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
November 5, 2017. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References2,7-aryl-9-substituted fluorenes and 9-substituted fluorene oligomers and polymers Patent #: 5708130 InventorsApplicationNo. 968852 filed on 11/05/1997US Classes:428/690, Fluroescent, phosphorescent, or luminescent layer257/E51.032, Polyflurorene and derivative (EPO)313/504, Organic phosphor428/691, Halogen-containing428/917, ELECTROLUMINESCENT528/422, NITROGEN-CONTAINING REACTANT528/425FROM ORGANIC OXYGEN-CONTAINING REACTANTExaminersPrimary: Nold, CharlesAttorney, Agent or FirmForeign Patent References
International ClassN05B 033/00AbstractFluorenes and polyfluorenes having one or two polar-group-containing alkyl substituents on their "9" carbon methylenes are disclosed together with the polymers' use as luminescent materials in organic light-emitting diodes and light-emitting electrochemical cells.Other References
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