Static structures (e.g. – buildings) – Wall – ceiling – floor – or roof designed for ventilation or...
Reexamination Certificate
2005-07-05
2005-07-05
Chapman, Jeanette E. (Department: 3635)
Static structures (e.g., buildings)
Wall, ceiling, floor, or roof designed for ventilation or...
C052S302300, C052S302400, C052S405100, C052S405400
Reexamination Certificate
active
06912820
ABSTRACT:
A drainage system for use in concrete masonry unit (CMU) wall construction comprises a tray unit of a size corresponding to size of CMUs, to be received beneath a course of CMUs, in use. The tray unit comprises opposite side flanges to abut a superjacent CMU and supporting a pan therebelow. A strip of water permeable material is attached to an upper surface of the pan and extends transversely beyond a front edge of the pan. A block of water permeable material is positioned above the pan and extends upwardly into a hollow core of a CMU. The water permeable material of the strip and the block has a porosity sufficient to permit water to pass there through but substantially insufficient to permit mortar and debris to pass there through so that water in a hollow core of a CMU drains through the strip.
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A prior art Mortar Net Block™ product manufactured by Mortar Net, Inc.
Baniak Pine & Gannon
Chapman Jeanette E.
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