Ballast block for roofing structures
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Feb 13, 1990
Grant Date -
N/A
app pub date -
Nov 13, 1985
filing date -
Nov 13, 1985
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A ballast block is disclosed in the form of a planar plate member. The plate member has a top and bottom surface, front and rear end portions and oppositely disposed lateral edges. The end portions include a mechanism for preventing substantial uplift and rotational displacement of the block when its end portions are interlinked in overlapping relationship with the corresponding end portions of like ballast blocks.
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International Classification(s)
Cited Art Landscape
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