71458978
Mar 8, 1943
Jul 13, 1943
A.F. VAN WOLF
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MATERIALS (IN LIQUID FORM), APPLICABLE TO CONCRETE (OR THE LIKE) FOR PURPOSES (A) HARDENING, (B) FINISHING, (C) WATERPROOFING, (D) SEALING, (E) ACIDPROOFING, AND/OR (F) STAINING THE CONCRETE (OR THE LIKE