Modular staircase and method of constructing same
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Sep 13, 2022
Grant Date -
Dec 31, 2020
app pub date -
May 22, 2020
filing date -
Jun 27, 2019
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A modular staircase frame is lightweight, adjustable, and may be brought to a worksite in pieces to be assembled. The modular staircase frame includes two opposing sets of laterally spaced blades, which may be adjustably connected to form laterally spaced ascending frame members. The opposing sets of blades may include a first pair of blades and a final pair of blades to anchor the frame to a first and second surface, respectively. The blades have openings for adjustable attachment of adjacent blades. The frame may also include stiffeners for added structural support. The opposing sets of laterally spaced blades may further include one or more corner blades for changing the direction of the staircase. Once the frame is installed, treads (temporary or final) can be removably installed on the frame to create a staircase.
First Claim
Other Claims data not available
Family
International Classification(s)
- 2020 Application Filing Year
- E04F Class
- 730 Applications Filed
- 464 Patents Issued To-Date
- 63.57 % Issued To-Date
Cited Art Landscape
Patent Citation Ranking
- 0 Citation Count
- E04F Class
- 0 % this patent is cited more than
- 3 Age
Maintenance Fees
| Fee | Large entity fee | small entity fee | micro entity fee | due date |
|---|---|---|---|---|
| 3.5 Year Payment | $1600.00 | $800.00 | $400.00 | Mar 13, 2026 |
| 7.5 Year Payment | $3600.00 | $1800.00 | $900.00 | Mar 13, 2030 |
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Mar 13, 2034 |
