Pyridones as antidandruff agents
Patent 4185106 Issued on January 22, 1980. Estimated Expiration Date: 
January 22, 1997. 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 22, 1997. 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 2742393 2922793 3236733 3269904 3644626 3655897 3883545 Process for the manufacture of 1-hydroxy-2-pyridones Process for the preparation of 1-hydroxy-pyridones Patent #: 3972888 InventorsAssigneeApplicationNo. 05/605210 filed on 08/15/1975US Classes:514/336, Additional hetero ring containing514/348, Chalcogens bonded directly to at least two ring carbons of the six-membered hetero ring514/351, Nitrogen attached indirectly to the six-membered hetero ring by nonionic bonding546/283.4, The additional hetero ring is five-membered546/290, Chalcogen bonded directly to ring carbon of the six-membered hetero ring546/294, Chalcogen bonded directly to chalcogen546/295, Halogen bonded directly to the six-membered hetero ring by nonionic bonding546/300, Nitrogen attached indirectly to the six-membered hetero ring by nonionic bonding546/301, Chalcogen attached indirectly to the six-membered hetero ring by nonionic bonding546/302, Halogen attached directly or indirectly to the six-membered hetero ring by nonionic bonding546/303Halogen attached directly or indirectly to the six-membered hetero ring by nonionic bondingExaminersPrimary: Thomas, James O. Jr.Assistant: Clarke, Vera C. Attorney, Agent or FirmInternational ClassA61K 31/44 (20060101)Foreign Application Priority Data1972-07-11 DEAbstractA cosmetic composition comprising a content of an 1-hydroxy-2-pyridone of the general formula ##STR1## in which R1 stands for hydrogen, alkyl of 1 to 17 carbon atoms, alkenyl of 2 to 17 carbon atoms, cycloalkyl of 5 to 8 carbon atoms, bicycloalkyl of 7 to 9 carbon atoms, cycloalkyl-alkyl of 1 to 4 alkyl carbon atoms, the cycloalkyl groups being optionally substituted by alkyl groups of 1 to 4 carbon atoms, aryl, aralkyl of 1 to 4 alkyl carbon atoms, aryl-alkenyl of 2 to 4 alkenyl carbon atoms, aryloxy-alkyl or arylthio-alkyl of 1 to 4 alkyl carbon atoms, benzhydryl, phenylsulfonyl-alkyl of 1 to 4 alkyl carbon atoms, furyl or furyl-alkenyl of 2 to 4 alkenyl carbon atoms, the aryl groups being optionally substituted by alkyl of 1 to 4 carbon atoms, by alkoxy of 1 to 4 carbon atoms, by nitro, cyano or halogen atoms, R2 stands for hydrogen, alkyl of 1 to 4 carbon atoms, alkenyl or alkinyl of 2 to 4 carbon atoms, halogen atoms or benzyl, R3 stands for hydrogen, alkyl of 1 to 4 carbon atoms or phenyl, and R4 stands for hydrogen, alkyl of 1 to 4 carbon atoms, alkenyl of 2 to 4 carbon atoms, methoxy-methyl, halogen or benzyl, and/or salt thereof, which may be used as an anti-dandruff agent. |
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