Patent US4060954A successfully refreshed from Google Patents.
US4060954A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bar chair for reinforcing rods
Assignee: Individual
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Filing: 1972-11-03
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Granted: 1977-12-06
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Expires: 1992-11-03
Abstract
Abstract A chair for supporting reinforcing bars having means for stacking one chair upon another to provide various sizes of chairs and for supporting a single layer of reinforcing bars or multiple layers of reinforcing bars, and having novel means for mounting the chair in soft bedding material such as sand, shell, gravel, mud or the like, which consists of a plate having upstanding studs to receive the tubular legs of the chairs.
Inventors
- 👤 James J. Liuzza
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:22
CPC Classifications
E; E04; E04C; E04C5/00; E04C5/16; E04C5/168; E04C5/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
114 words
In a bar chair for reinforcing rods, a substantially rectangular body, having a depending cylindrical leg at each corner and opposed, upstanding cylindrical studs, the lower portion of said depending legs being tubular and the upstanding studs forming guides for the reinforcing rods to be mounted on said chair, and being of a reduced diameter adapted to fit in said tubular portion of the depending legs and extend upwardly therein for vertical support, and a detachable sand plate comprising a flat base member adapted to lie on the sand bed of a concrete slab excavation, upstanding cylindrical studs on said base to be received by the tubular portion of said legs of the chair.
Claim 2
Dependent Claim
114 words
In a bar chair for reinforcing rods, a substantially rectangular body, having a depending cylindrical leg at each corner and opposed, upstanding cylindrical studs, the lower portion of said depending legs being tubular and the upstanding studs forming guides for the reinforcing rods to be mounted on said chair, and being of a reduced diameter adapted to fit in said tubular portion of the depending legs and extend upwardly therein for vertical support, and a detachable sand plate comprising a flat base member adapted to lie on the sand bed of a concrete slab excavation, upstanding cylindrical studs on said base to be received by the tubular portion of said legs of the chair.
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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) | 1980-12-05 | 1981-06-06 | 1981-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-12-05 | 1985-06-06 | 1985-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-12-05 | 1989-06-06 | 1989-12-06 | $7700.00 | Window Closed / Lapsed |