Patent US3857217A successfully refreshed from Google Patents.
US3857217A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lightweight, rigid structural panel for walls, ceilings and the like
Assignee: Individual
•
Filing: 1972-11-15
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Granted: 1974-12-31
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Expires: 1992-11-15
Abstract
Abstract A structural panel is disclosed having a core comprising a plurality of recesses or tubular-shaped passageways formed of web material which open onto opposite sides of the core. A first layer of woven material is positioned adjacent the openings on one side of the core and a second layer of woven material is positioned adjacent the openings on the other side of the core. A covering of cementatious material completely surrounds the core partially filling the recesses or tubular-shaped passageways to form the panel.
Inventors
- 👤 W Reps
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 09:44
CPC Classifications
B; B32; B32B; B32B5/00; B32B5/02; B32B5/024; E; E04; E04C; E04C2/00; E04C2/30; E04C2/34; E04C2/36; B32B17/00; B32B17/02; B32B2315/00; B32B2315/08; B32B2315/085; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24149; Y10T428/24744; Y10T428/24777; Y10T428/24785
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
197 words
A lightweight, rigid, structural panel of cementatious material comprising: a. a core consisting of webbed material having a plurality of open-ended, separate tubular recesses of substantially equal height, a layer of very fine mesh reinforcing material adjacent to and covering one end of said recesses, said fine mesh material having a mesh on the order of ten per linear inch to insure the passage therethRough of only a sufficient amount of said cementatious material into said recesses to secure said layer of fine mesh material to said core, and a layer of coarse mesh material adjacent and covering the other end of said recesses, said coarse mesh material having a mesh on the order of four per linear inch to insure the ready passage therethrough of a greater amount of said cementatious material into said recesses than said first layer to secure said permeable material to said core, and b. cementatious material covering said fine and coarse mesh material and said entire core to form a monolithic panel, said layers of fine and coarse mesh reinforcing material, when secured to said webbed material by said cementatious material, serve to prevent said panel from flexing under applied loads.
Claim 2
Dependent Claim
197 words
A lightweight, rigid, structural panel of cementatious material comprising: a. a core consisting of webbed material having a plurality of open-ended, separate tubular recesses of substantially equal height, a layer of very fine mesh reinforcing material adjacent to and covering one end of said recesses, said fine mesh material having a mesh on the order of ten per linear inch to insure the passage therethRough of only a sufficient amount of said cementatious material into said recesses to secure said layer of fine mesh material to said core, and a layer of coarse mesh material adjacent and covering the other end of said recesses, said coarse mesh material having a mesh on the order of four per linear inch to insure the ready passage therethrough of a greater amount of said cementatious material into said recesses than said first layer to secure said permeable material to said core, and b. cementatious material covering said fine and coarse mesh material and said entire core to form a monolithic panel, said layers of fine and coarse mesh reinforcing material, when secured to said webbed material by said cementatious material, serve to prevent said panel from flexing under applied loads.
Claim 3
Dependent Claim
31 words
A structural panel as set forth in claim 1 further comprising a tongue formed on one surface of said panel and a groove formed on the other surface of said panel.
Claim 4
Dependent Claim
19 words
A structural panel as set forth in claim 2 wherein said cementatious material has reinforcing elements dispersed throughout it.
Claim 5
Dependent Claim
23 words
A structural panel as set forth in claim 2 wherein said cementatious material extends into said recesses, a distance of approximately one-half inch.
Claim 6
Dependent Claim
30 words
A structural panel as set forth in claim 2 wherein said fine mesh and said permeable material are secured to said core by tying means extending through said hollow recesses.
Claim 7
Dependent Claim
21 words
A structural panel as set forth in claim 1 wherein said fine mesh and said coarse mesh woven material is fiberous.
Claim 8
Dependent Claim
15 words
A structural panel as set forth in claim 2 wherein said webbed material is fiberous.
References Cited (Backward Citations)
US1875131A
Cited
US1972592A
Cited
US2639606A
Cited
GB723621A
Cited
US2692219A
Cited
US2828235A
Cited
US2839442A
Cited
US2951004A
Cited
US3249659A
Cited
US3328932A
Cited
US3529389A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-12-30 | 1978-07-01 | 1978-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-30 | 1982-07-01 | 1982-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-30 | 1986-07-01 | 1986-12-31 | $7700.00 | Window Closed / Lapsed |