Fluorescent whitening agent, its preparation and use
Patent 6165973 Issued on December 26, 2000. Estimated Expiration Date: 
January 28, 2020. 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.
January 28, 2020. 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 References 3766083 3853583 Stable aqueous formulations of stilbene fluorescent whitening agents Color salt-containing optical brightener composition Stable purified aqueous solutions of fluorescent whitening agent Whitener dispersion Textile treatment Textile treatment Patent #: 5800862 InventorAssigneeApplicationNo. 493341 filed on 01/28/2000US Classes:510/516, With diverse textile treating component (e.g., laundry sour, optical brightener, etc.)252/301.21, Optical brightening compositions252/301.23, Triazines510/461, Specific organic component (e.g., triazines, etc.)510/518Halogen, nitrogen, oxygen, or phosphorus containing chemical bleach or oxidant or antiseptic, biocidal, or deodorant componentExaminersPrimary: Gupta, Yogendra N.Assistant: Petruncio, John M Attorney, Agent or FirmForeign Patent References
International ClassesC09K 011/06C11D 003/00 C11D 015/00 D06L 003/00 AbstractA fluorescent whitening agent comprising a mixture of compounds of the formulae Ia, Ib and Ic: ##STR1## in which the --SO3 R groups are in the meta and/or para position, and wherein R and M, independently of each other are H, Na, Li, K, Ca, Mg, ammonium, or ammonium that is mono-, di-, tri- or tetra-substituted by C1 -C4 alkyl, C1 -C4 -hydroxyalkyl or a mixture thereof, a process for its preparation and its use to brighten paper and especially textile materials.Field of SearchWith diverse textile treating component (e.g., laundry sour, optical brightener, etc.)Halogen, nitrogen, oxygen, or phosphorus containing chemical bleach or oxidant or antiseptic, biocidal, or deodorant component Specific organic component (e.g., triazines, etc.) Optical brightening compositions Triazines | |
