US3818664A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Insulated tank base and insulated block
Assignee: Boeing North American Inc
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Filing: 1973-02-08
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Granted: 1974-06-25
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Expires: 1993-02-08
Abstract
Abstract An insulated base for a cryogenic liquid storage tank is formed of a plurality of horizontally extending layers of base insulation blocks having a high compressive strength, low thermal conductivity and which are impervious to water vapor. Each block comprises a closed paperboard box of 20'''' X 40'''' X 4'''' thick having a plurality of vertical divider panels forming a loadbearing grid within the box. All space within the box is filled with a foam-in-place polyurethane that bonds itself to all surfaces of the box and to the divider panels to thereby laterally support and stiffen the load-bearing panels. Each box is individually encapsulated by being completely covered with a vapor-impervious coating. Additional strength is provided by a tension strip completely encircling the 4-inch sides of the box.
Inventors
- 👤 E Hillberg
- 👤 L Isenberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:42
CPC Classifications
E; E04; E04B; E04B1/00; E04B1/62; E04B1/74; E04B1/76; E04B1/78; E04C; E04C1/00; E04C1/40; E04C2/00; E04C2/02; E04C2/10; E04C2/24; E04C2/243; Y; Y10; Y10S; Y10S220/00; Y10S220/902; Y10T; Y10T428/00; Y10T428/23; Y10T428/233; Y10T428/24; Y10T428/24149
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
160 words
For use in an insulated base for supporting a storage tank for cryogenic liquids, a plurality of base insulation blocks adapted to be laid in a plurality of horizontally extending, relatively staggered layers beneath the bottom of the tank, said blocks each having a high compressive strength, a low thermal conductivity and being impervious to water vapor, each said block comprising a closed cardboard container having sides, ends, top and bottom, a divider grid having intersecting dIvider panels extending from side to side, end to end and top to bottom of said container to divide the container into a number of separate compartments, a foam-in-place urethane foam emplaced within said container and substantially entirely filling the interior thereof in close and bonded contact with the interior surfaces of the container and the surfaces of said divider grid, to thereby laterally support and stiffen the panels of said divider grid, and a vapor-impervious coating entirely covering the exterior of the container.
Claim 2
Dependent Claim
160 words
For use in an insulated base for supporting a storage tank for cryogenic liquids, a plurality of base insulation blocks adapted to be laid in a plurality of horizontally extending, relatively staggered layers beneath the bottom of the tank, said blocks each having a high compressive strength, a low thermal conductivity and being impervious to water vapor, each said block comprising a closed cardboard container having sides, ends, top and bottom, a divider grid having intersecting dIvider panels extending from side to side, end to end and top to bottom of said container to divide the container into a number of separate compartments, a foam-in-place urethane foam emplaced within said container and substantially entirely filling the interior thereof in close and bonded contact with the interior surfaces of the container and the surfaces of said divider grid, to thereby laterally support and stiffen the panels of said divider grid, and a vapor-impervious coating entirely covering the exterior of the container.
Claim 3
Dependent Claim
17 words
The apparatus of claim 1 including a tensile reinforcing strip entirely encircling the exterior of said container.
Claim 4
Dependent Claim
48 words
The base insulation blocks of claim 1 wherein said container is of a rectangular configuration having substantially horizontal top and bottom of relatively large dimensions and having sides and ends of relatively small dimensions, and including a tensile reinforcing strip entirely encircling said sides and ends bonded thereto.
Claim 5
Dependent Claim
91 words
A base insulation block comprising a closed container having a top and bottom and a continuous sidewall extending between said top and bottom, a plurality of divider panels within said container extending from said top to said bottom, a urethane foam substantially entirely filling said container and in contact with the inner surfaces thereof and with said divider panels to thereby support and stabilize said divider panels when the latter are subjected to compressive loads applied to said top and bottom of the container, and a vapor-impervious barrier encapsulating said container.
Claim 6
Dependent Claim
91 words
A base insulation block comprising a closed container having a top and bottom and a continuous sidewall extending between said top and bottom, a plurality of divider panels within said container extending from said top to said bottom, a urethane foam substantially entirely filling said container and in contact with the inner surfaces thereof and with said divider panels to thereby support and stabilize said divider panels when the latter are subjected to compressive loads applied to said top and bottom of the container, and a vapor-impervious barrier encapsulating said container.
Claim 7
Dependent Claim
14 words
The block of claim 4 wherein said container is made of phenolic impregnated paper.
Claim 8
Dependent Claim
35 words
The block of claim 3 wherein said sidewall includes first and second opposite sides, said top being formed in two mating flaps, each integral with a respective one of said first and second opposite sides.
Claim 9
Dependent Claim
28 words
The block of claim 6 wherein said block has a thickness of from 2 to 6 inches, and a length and width from 10 to 80 inches each.
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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) | 1977-06-24 | 1977-12-24 | 1978-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-24 | 1981-12-24 | 1982-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-24 | 1985-12-24 | 1986-06-25 | $7700.00 | Window Closed / Lapsed |