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US 4,962,006 AGranted
Method of coloring cement
AssigneeColor-Crete
InventorHenry C. Oat
Life of this patent
Estimating the term…
Abstract
A method of coloring cement containing products includes applying a metal sulfate to the surface of the product in the presence of water.
Claims13
A method of coloring a surface of a preformed cement containing product, comprising
- applying a metal sulfate to said surface of said product in the presence of water, and
- permitting said metal sulfate to impart a permanent color to said surface under ambient conditions.
Dependencies are inferred from the claim text.