Static structures (e.g. – buildings) – Stepped; e.g. – stair – Tread unit on horizontal tread member connected to riser
Reexamination Certificate
2009-05-28
2011-10-11
Canfield, Robert (Department: 3633)
Static structures (e.g., buildings)
Stepped; e.g., stair
Tread unit on horizontal tread member connected to riser
C052S191000, C052S183000, C052S179000
Reexamination Certificate
active
08033063
ABSTRACT:
A stair system including an upper tread having a substantially planar body portion, a stair nose portion located at one side of the planar body portion, and a dado located behind the stair nose portion, at least one lower tread, the lower tread having a substantially planar body portion, a stair nose portion located at one side of the planar body portion, a dado located behind the stair nose portion, and a groove located at a side opposite the stair nose portion, and at least two risers, each riser having a substantially planar body portion. In the stair system, one of the at least two risers is receivable between the dado of the upper tread and the groove of the lower tread and the other of the at least two risers is receivable in the dado of the lower tread.
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Birch & Stewart Kolasch & Birch, LLP
Canfield Robert
Demuren Babajide
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