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US 4,055,322 AGranted
Permeable liner having concrete setting retardant
OwnerHugh I. Cassidyinventor
Life of this patent
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Abstract
There is disclosed an article useful for producing concrete with textured patterns which includes a membrane of water permeable material having a pattern prepared on one side thereof with a water soluble retardant for the setting of cement and with the retardant pattern completely covered with a waterproof film that is bonded to the membrane immediately adjacent the retardant pattern. There is also disclosed a method for preparing concrete to have a pattern on its surface employing the article.
Claims8
An article for preparing concrete with a textured pattern on the surface thereof comprising:
- A. a water permeable membrane,
- B. a pattern on one side of said membrane with said pattern delineated by a water soluble retardant which retards setting of cement, and
- C. a waterproof film coating said pattern and bonded to said membrane immediately adjacent to the delineation of said pattern.
Dependencies are inferred from the claim text.