Patent US4112173A successfully refreshed from Google Patents.
US4112173A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Concrete module unit
Assignee: Champion International Corp
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Filing: 1977-02-15
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Granted: 1978-09-05
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Expires: 1997-02-15
Abstract
Abstract A casting sheet comprising medium to high density polyethylene provides low release resistance when used as a liner for casting concrete articles. The casting sheet may comprise polyethylene-coated paperboard having a polyethylene coating on both sides, and such sheet be employed, for example, as a separator for concrete wall panels cast on-site in a superposed manner for tilt-slab construction or for other concrete construction.
Inventors
- 👤 Allen T. Roudebush
- 👤 Kenneth P. Thompson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 01:54
CPC Classifications
B; B28; B28B; B28B7/00; B28B7/36; B28B7/364; B28B7/0088; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24942; Y10T428/2495; Y10T428/24967; Y10T428/24992; Y10T428/26; Y10T428/269; Y10T428/31504; Y10T428/31652; Y10T428/31667; Y10T428/31855; Y10T428/3188; Y10T428/31895; Y10T428/31899; Y10T428/31902
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
104 words
An assembly for use in the construction of building walls, which comprises a plurality of spaced, superposed concrete module layers and a plurality of thin, flexible casting sheet means having a low release resistance when separated from said module layers after hardening thereof, each of said casting sheet means comprising a thin, flexible base sheet, each of said base sheets being generally planar, at least one side of each base sheet having a thin coating of polyethylene having a density of 0.930 to 0.965 gm./cc., each of said module layers being separated from the other of said module layers by said casting sheet means.
Claim 2
Dependent Claim
104 words
An assembly for use in the construction of building walls, which comprises a plurality of spaced, superposed concrete module layers and a plurality of thin, flexible casting sheet means having a low release resistance when separated from said module layers after hardening thereof, each of said casting sheet means comprising a thin, flexible base sheet, each of said base sheets being generally planar, at least one side of each base sheet having a thin coating of polyethylene having a density of 0.930 to 0.965 gm./cc., each of said module layers being separated from the other of said module layers by said casting sheet means.
Claim 3
Dependent Claim
14 words
The assembly of claim 1, wherein said module layers each have substantially indentical dimensions.
Claim 4
Dependent Claim
24 words
The assembly of claim 1, wherein each polyethylene coating is in the form of a film having a thickness of 0.0005 to 0.006 inch.
Claim 5
Dependent Claim
23 words
The assembly of claim 1, wherein each base sheet has an additional coating of polyethylene on the other side of each base sheet.
Claim 6
Dependent Claim
29 words
The assembly of claim 4, wherein each additional coating of polyethylene has a density less than that of the polyethylene coating on the one side of its base sheet.
Claim 7
Dependent Claim
13 words
The assembly of claim 1, wherein each base sheet is formed of paper.
Claim 8
Dependent Claim
23 words
The assembly of claim 1, wherein each of said module layers is a wall panel in excess of 30 feet in one dimension.
Claim 9
Dependent Claim
90 words
A concrete module unit comprising a concrete layer having a thin, flexible casting sheet means having a low release resistance when separated from said concrete layer after hardening thereof superimposed adjacent at least one surface of said concrete layer, said casting sheet means comprising a thin, flexible base sheet, said base sheet being generally planar, at least one side of said base sheet having a thin coating of polyethylene having a density of 0.930 to 0.965 gm./cc., said polyethylene coating being in contact with said surface of said concrete layer.
Claim 10
Dependent Claim
90 words
A concrete module unit comprising a concrete layer having a thin, flexible casting sheet means having a low release resistance when separated from said concrete layer after hardening thereof superimposed adjacent at least one surface of said concrete layer, said casting sheet means comprising a thin, flexible base sheet, said base sheet being generally planar, at least one side of said base sheet having a thin coating of polyethylene having a density of 0.930 to 0.965 gm./cc., said polyethylene coating being in contact with said surface of said concrete layer.
Claim 11
Dependent Claim
25 words
The module unit of claim 8 wherein said polyethylene coating is in the form of a film having a thickness of 0.0005 to 0.006 inch.
Claim 12
Dependent Claim
24 words
The module unit of claim 8, wherein said base sheet has an additional coating of polyethylene on the other side of said base sheet.
Claim 13
Dependent Claim
30 words
The module unit of claim 10, wherein said additional coating of polyethylene has a density less than that of the polyethylene coating on said one side of said base sheet.
Claim 14
Dependent Claim
14 words
The module unit of claim 8, wherein said base sheet is formed of paper.
Claim 15
Dependent Claim
25 words
The module unit of claim 8, wherein said casting sheet means is capable of falling away from the hardened concrete layer under its own weight.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-09-04 | 1982-03-06 | 1982-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-09-04 | 1986-03-06 | 1986-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-09-04 | 1990-03-06 | 1990-09-05 | $7700.00 | Window Closed / Lapsed |