Building materials

Details Building materials Building materials

1997-12-31

1999-11-23

Friedman, Carl D.

Static structures (e.g., buildings)

Ornamental: color, thickness variation, or dissimilar...

Integral relief of face

52314, 523111, B44F 100

Patent

active

059878312

ABSTRACT:
A building product has an exposed surface provided by a multiplicity of linearly extending parallel asymmetric depressions of saw tooth configuration. Thus, a coloured exposed surface appearance apparently changes colour as relative positions of the building product and viewer change.

REFERENCES:
patent: 1697426 (1929-01-01), Humphreys et al.
patent: 1788407 (1931-01-01), Prentis, Jr.
patent: 1877481 (1932-09-01), Prouty
patent: 2069720 (1937-02-01), Harvey
patent: 3338730 (1967-08-01), Slade et al.

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