Stairway

Details Stairway Stairway

2011-07-05

2011-07-05

Katcheves, Basil (Department: 3635)

Static structures (e.g., buildings)

Stepped; e.g., stair

Tread unit on horizontal tread member connected to riser

C052S184000, C052S191000

Reexamination Certificate

active

07971399

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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