Patent US3773604A successfully refreshed from Google Patents.
US3773604A
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US
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Structural light-weight panel of high strength,having theral insulation properties and enclosures formed thereby
Assignee: Balsa Ecuador Lumber Corp
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Filing: 1971-11-10
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Granted: 1973-11-20
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Expires: 1991-11-10
Abstract
Abstract A structural light-weight panel of high strength, having thermal insulation properties that render the panel particularly suitable for cryogenic and elevated temperature applications. The panel is constituted by a composite core bonded to a carrier membrane or laminated to facing skins, the core including at least one layer formed by a series of balsa beams in spaced relation, the spacing between the beams being filled with slabs of an insulating material such as rigid foam plastic material whose k-factor is similar to that of balsa, whereby the overall thermal insulating characteristics of the composite core are effectively equivalent to that of a homogeneous core composed entirely of foam plastic material, whereas the structural characteristics of the composite core are far superior thereto. The panels are useable as liners for structural enclosures for the storage of fluids at cryogenic to high temperatures.
Inventors
- 👤 R Desai
- 👤 G Dohn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:45
CPC Classifications
B; B32; B32B; B32B5/00; B32B5/22; B32B5/24; B32B5/245; F; F17; F17C; F17C3/00; F17C3/02; F17C3/022; B32B5/02; B32B5/028; B32B5/18; F17C13/00; F17C13/001; B32B2305/00; B32B2305/38; B32B2307/00; B32B2307/70; B32B2307/718; B32B2605/00; F17C2201/00; F17C2201/01; F17C2201/0104; F17C2201/0119; F17C2201/03; F17C2201/032; F17C2201/05; F17C2201/052; F17C2203/00; F17C2203/01; F17C2203/011; F17C2203/012; F17C2203/03; F17C2203/0304; F17C2203/0329; F17C2203/0333; F17C2203/0337; F17C2203/0341; F17C2203/0345; F17C2203/0354; F17C2203/0358; F17C2203/06; F17C2203/0602; F17C2203/0604; F17C2203/0634; F17C2203/0636; F17C2203/0648; F17C2221/00; F17C2221/03; F17C2221/032; F17C2221/033; F17C2223/00; F17C2223/01; F17C2223/0146; F17C2223/0153; F17C2223/0161; F17C2223/03; F17C2223/033; F17C2260/00; F17C2260/01; F17C2260/011; F17C2260/03; F17C2260/031; F17C2260/033; F17C2260/035; F17C2260/036; F17C2270/00; F17C2270/01; F17C2270/0102; F17C2270/011; F17C2270/0142; F17C2270/0144; F17C2270/0147; F17C2270/0165; F17C2270/0168; F17C2270/0171; F17C2270/0173; Y; Y10; Y10S; Y10S220/00; Y10S220/901; Y10T; Y10T428/00; Y10T428/16; Y10T428/163; Y10T428/164; Y10T428/166; Y10T428/18; Y10T428/183; Y10T428/187; Y10T428/24; Y10T428/24058; Y10T428/24066; Y10T428/249921; Y10T428/249953; Y10T428/249962; Y10T428/249964; Y10T428/249965; Y10T428/249966; Y10T428/249981
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
21 words
A panel as set forth in claim 1, further including a facing sheet bonded to the other face of the core.
Claim 2
Dependent Claim
20 words
A panel as set forth in claim 1, wherein said synthetic thermal insulating material is a rigid foam plastic material.
Claim 3
Dependent Claim
26 words
A panel as set forth in claim 3, wherein said foam material is selected from the class consisting of polyurethane, polystyrene, polyvinyl chloride and foamed glass.
Claim 4
Dependent Claim
24 words
A panel As set forth in claim 1, wherein said facing sheet is formed by an open-mesh scrim fabricated of a flexible, non-stretchable material.
Claim 5
Dependent Claim
24 words
A panel as set forth in claim 1, wherein said slabs are pre-compressed to an extent avoiding gapping as a result of thermal contraction.
Claim 6
Dependent Claim
17 words
A panel as set forth in claim 2, wherein said facing sheets are formed of metallic sheeting.
Claim 7
Dependent Claim
35 words
A panel as set forth in claim 1, wherein said core is composed of a plurality of supporting layers, the beams and slabs of each layer being displaced relative to those of the other layers.
Claim 8
Dependent Claim
20 words
A panel as set forth in claim 8, wherein three layers are provided, the layers being mutually displaced by 60*.
Claim 9
Dependent Claim
26 words
A container for a cryogenic liquid, including a tank for storing said liquid, said tank being mounted on a panel as set forth in claim 1.
Claim 10
Dependent Claim
23 words
A container as set forth in claim 10, further including an insulating jacket surrounding the tank and formed of the same core material.
Claim 11
Dependent Claim
88 words
A panel as set forth in claim 1, said panel having a top layer formed by a series of balsa beams in spaced relation to a series of slabs of synthetic thermal insulating material disposed in the spacing between the beams, and a bottom layer displaced from the top layer to define a ledge and an overhang to facilitate connection to adjoining panels, the beams and slabs in the top layer which overlie the bottom layer being in registration with identical beams and slabs in the bottom layer.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-11-19 | 1977-05-21 | 1977-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-19 | 1981-05-21 | 1981-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-19 | 1985-05-21 | 1985-11-20 | $7700.00 | Window Closed / Lapsed |