Etching a substrate: processes – Forming groove or hole in a substrate which is subsequently...
Patent
1993-09-28
1996-05-28
Aftergut, Karen
Etching a substrate: processes
Forming groove or hole in a substrate which is subsequently...
216 30, 216 96, 264245, B28B 116
Patent
active
055202985
ABSTRACT:
A method of decorating concrete including the steps of mixing water, aggregate and cement to provide mortar, pouring the mortar into a form and allowing it to cure and harden into a concrete block having an exterior surface, and applying sulfate to a selected portion of the block to color the surface of the block to a predetermined depth while the mortar is being cured.
REFERENCES:
patent: 716371 (1902-12-01), Black et al.
patent: 3058164 (1962-10-01), Rowe
patent: 3795721 (1974-03-01), Gilbert et al.
patent: 4043826 (1977-08-01), Hum
patent: 4769191 (1988-09-01), Diana
patent: 5372676 (1994-12-01), Lowe
Aftergut Karen
Swartz John J.
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