Patent US6249055B1 successfully refreshed from Google Patents.
US3884444A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Concrete form liner
Assignee: Interform Inc
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Filing: 1973-08-08
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Granted: 1975-05-20
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Expires: 1993-08-08
Abstract
Abstract A liner assembly for attaching to a structural concrete form to provide a desired texture to concrete walls and columns, including multiple form liner elements constructed to be snapped together and attached to the structural form. Each of the elements is trough shaped, with an inner wall and pair of side walls, one of the side walls having a flange with a first hook at its end, and the other side wall having a second hook and a retainer near the second hook. The form liner elements can be snapped together, with the first hook of one element retained between the second hook and retainer of another form liner element, and the flanges of each of the elements can be nailed or otherwise fastened to the structural form. The interlocking elements allow an architect to vary the wall texture or pattern at selected areas, such as at doorways, and facilitates reuse of the liners because they can be taken apart and reassembled to any desired wall size, the interlocking feature preventing leakage of concrete between the liner elements.
Inventors
- 👤 Stephen S Dashew
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:34
CPC Classifications
E; E04; E04G; E04G9/00; E04G9/10
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
145 words
A concrete form liner comprising: a plurality of trough-shaped elements of substantially constant cross-section each having an inner wall and first and second outwardly extending side walls, said first side wall having a flange extending sidewardly away from said second side wall and having a first hook at its end, and said second side wall having a first hook at its end, and said second side wall having a second hook at its outer end extending towards said first side wall so that said elements can be held together with a first hook on one of said elements engaged with the second hook of another of said elements; each of said trough-shaped elements including a retainer wall (36) with a portion spaced from said second hook of the same element by a distance sufficient to engage and maintain therebetween the first hook on another element.
Claim 2
Dependent Claim
145 words
A concrete form liner comprising: a plurality of trough-shaped elements of substantially constant cross-section each having an inner wall and first and second outwardly extending side walls, said first side wall having a flange extending sidewardly away from said second side wall and having a first hook at its end, and said second side wall having a first hook at its end, and said second side wall having a second hook at its outer end extending towards said first side wall so that said elements can be held together with a first hook on one of said elements engaged with the second hook of another of said elements; each of said trough-shaped elements including a retainer wall (36) with a portion spaced from said second hook of the same element by a distance sufficient to engage and maintain therebetween the first hook on another element.
Claim 3
Dependent Claim
121 words
A concrete form liner comprising: a trough-shaped element having an inner wall and first and second outwardly extending side walls, said first side wall having a flange extending sidewardly away from said second side wall and having a first hook at its end, and said second side wall having a second hook at its outer end extending towards said first side wall, said element also having a retainer comprising a wall fixed to said second side wall and lying between the side walls and spaced a predetermined distance from the second hook, so that said element can be held to another similar element with a first hook on one element engaged between the second hook and retainer of the other element.
Claim 4
Dependent Claim
121 words
A concrete form liner comprising: a trough-shaped element having an inner wall and first and second outwardly extending side walls, said first side wall having a flange extending sidewardly away from said second side wall and having a first hook at its end, and said second side wall having a second hook at its outer end extending towards said first side wall, said element also having a retainer comprising a wall fixed to said second side wall and lying between the side walls and spaced a predetermined distance from the second hook, so that said element can be held to another similar element with a first hook on one element engaged between the second hook and retainer of the other element.
Claim 5
Dependent Claim
193 words
A concrete form liner for attachment to a flat support surface comprising: a plurality of interfitting trough-shaped elements of substantially constant cross-section each having an inner wall (22) and first and second outwardly extending side walls, said first side wall (26) having a substantially flat flange (28) extending in a direction sidewardly away from said second side wall (24) and having an inwardly extending part at the end of the flange which is received between the side walls of another element at a location against the second side wall (24a) of the other element, the second side wall (24a) of the other element having an outer end which lies against said flat flange to form an intersection that is substantially sealed to the passage of concrete between said flange and side wall outer end and that is exposed to mold concrete into an attractive corner configuration; each of said trough-shaped elements including a retainer wall (36) located between the side walls with a portion spaced from the outer end of the second side wall of the same element by a distance sufficient to engage and maintain therebetween the inwardly-extending part of another element.
Claim 6
Dependent Claim
193 words
A concrete form liner for attachment to a flat support surface comprising: a plurality of interfitting trough-shaped elements of substantially constant cross-section each having an inner wall (22) and first and second outwardly extending side walls, said first side wall (26) having a substantially flat flange (28) extending in a direction sidewardly away from said second side wall (24) and having an inwardly extending part at the end of the flange which is received between the side walls of another element at a location against the second side wall (24a) of the other element, the second side wall (24a) of the other element having an outer end which lies against said flat flange to form an intersection that is substantially sealed to the passage of concrete between said flange and side wall outer end and that is exposed to mold concrete into an attractive corner configuration; each of said trough-shaped elements including a retainer wall (36) located between the side walls with a portion spaced from the outer end of the second side wall of the same element by a distance sufficient to engage and maintain therebetween the inwardly-extending part of another element.
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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) | 1978-05-19 | 1978-11-18 | 1979-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-19 | 1982-11-18 | 1983-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-19 | 1986-11-18 | 1987-05-20 | $7700.00 | Window Closed / Lapsed |