US4457397A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Platform for stairs
Assignee: Individual
•
Filing: 1981-11-10
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Granted: 1984-07-03
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Expires: 2001-11-10
Abstract
Abstract This invention relates to new and useful improvements in a platform for stairs, and the principal object of the invention is to provide a device which may be effectively employed as a scaffold structure for stairs, or a step-up platform to reach portions of the ceiling and the walls of a room.
Inventors
- 👤 John J. Scala
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 07:59
CPC Classifications
E; E06; E06C; E06C7/00; E06C7/42; E06C7/426; E04; E04G; E04G1/00; E04G1/24; E04G1/28; E04G1/36; E04G1/365
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
233 words
A platform for stairs comprising: a. a platform; b. a frame integrally secured to the edges of the platform; c. a first plurality of sleeves extending transversely from the bottom portion of the frame secured to a first edge of the platform; d. means to attach the first plurality of sleeves to the frame of the platform near the first edge; e. a first plurality of lower legs slid inside the first plurality of sleeves and resting on a first step or floor; f. means to adjustably and rigidly secure the first plurality of legs to the first plurality of sleeves; g. a second plurality of sleeves extending transversely from the middle portion of the platform and supporting the middle portion of the platform; h. a second plurality of lower legs slid inside the first pluarlity of sleeves and resting on a second step one step higher than the first step or the floor; i. means to attach the second plurality of sleeves to the middle portion of the platform; j. means to secure the second plurality of legs adjustably and rigidly to the second plurality of sleeves; k. a bottom portion of the platform and frame including the second end of the platform opposite the first end of the platform supported by resting horizontally against a third stair step two steps higher on the stairs than the first stair step or floor.
Claim 2
Dependent Claim
233 words
A platform for stairs comprising: a. a platform; b. a frame integrally secured to the edges of the platform; c. a first plurality of sleeves extending transversely from the bottom portion of the frame secured to a first edge of the platform; d. means to attach the first plurality of sleeves to the frame of the platform near the first edge; e. a first plurality of lower legs slid inside the first plurality of sleeves and resting on a first step or floor; f. means to adjustably and rigidly secure the first plurality of legs to the first plurality of sleeves; g. a second plurality of sleeves extending transversely from the middle portion of the platform and supporting the middle portion of the platform; h. a second plurality of lower legs slid inside the first pluarlity of sleeves and resting on a second step one step higher than the first step or the floor; i. means to attach the second plurality of sleeves to the middle portion of the platform; j. means to secure the second plurality of legs adjustably and rigidly to the second plurality of sleeves; k. a bottom portion of the platform and frame including the second end of the platform opposite the first end of the platform supported by resting horizontally against a third stair step two steps higher on the stairs than the first stair step or floor.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-07-03 | 1988-01-02 | 1988-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-07-03 | 1992-01-02 | 1992-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-07-03 | 1996-01-02 | 1996-07-03 | $7700.00 | Window Closed / Lapsed |