Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Stephen E. Ronsheim0
Date of Patent
July 5, 2011
0Patent Application Number
126456370
Date Filed
December 23, 2009
0Patent Citations Received
Patent Primary Examiner
Patent abstract
A stairway having an alternating series of risers and treads wherein two risers and a tread form a step structure for use in constructing the stairway. The step structure including a first riser having a front portion and a rear portion, a tread having a support surface and an opposite surface, a second riser having a front portion and a rear portion, and wherein the tread is positioned between the rear portion of the first riser and the front portion of the second riser and wherein the second riser of one step structure becomes the first riser of the next-up step structure.
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