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US 4,345,080 AGranted
Pyridinethione salts and hair care compositions
AssigneeThe Procter & Gamble Company
InventorRaymond E. Bolich, Jr.
Life of this patent
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Abstract
Metal salts of pyridinethione useful in shampoos, creme rinses and other hair care compositions to deliver antidandruff benefits while not detracting as much as previous pyridinethione salts from the compositions' aesthetics. Compositions containing such salts are also included.
Claims4
Heavy metal, magnesium or aluminum salts of N-hydroxy pyridinethione which are predominately flat platelet crystals having a mean sphericity less than about 0.65 and a median equivalent spherical diameter based on volume of at least about 2.mu. but less than about 15.mu..
Dependencies are inferred from the claim text.