US4044184A
Expired / Lapsed
US
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Cryogenic insulating structure
Assignee: Mitsubishi Chemical Corp
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Filing: 1975-09-12
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Granted: 1977-08-23
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Expires: 1995-09-12
Abstract
Abstract A cryogenic heat insulating structure comprises: a wall coated with a plurality of superposed rigid foam layers each of the layers having a skin and each layer containing fibers oriented parallel to the wall.
Inventors
- 👤 Kaneyoshi Ashida
- 👤 Masaaki Ohtani
- 👤 Makoto Ichii
- 👤 Tatsuhiko Kobayashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:05
CPC Classifications
B; B32; B32B; B32B5/00; B32B5/18; F; F16; F16L; F16L59/00; F16L59/02; F16L59/028; F16L59/14; F16L59/141; F17; F17C; F17C13/00; F17C13/001; F17C3/00; F17C3/02; F17C3/04; F17C3/06; B32B2262/00; B32B2262/10; B32B2262/101; B32B2307/00; B32B2307/30; B32B2307/304; B32B2439/00; B32B2597/00; F17C2203/00; F17C2203/03; F17C2203/0304; F17C2203/0329; F17C2203/0333; F17C2203/0345; F17C2203/06; F17C2203/0602; F17C2203/0612; F17C2203/0626; F17C2203/0631; F17C2203/0634; F17C2203/0636; F17C2203/0639; F17C2203/0646; F17C2203/0648; F17C2209/00; F17C2209/22; F17C2209/225; F17C2209/23; F17C2209/238; F17C2221/00; F17C2221/03; F17C2221/032; F17C2221/033; F17C2223/00; F17C2223/01; F17C2223/0146; F17C2223/0153; F17C2223/0161; F17C2223/03; F17C2223/033; F17C2260/00; F17C2260/03; F17C2260/031; F17C2260/033; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24058; Y10T428/24124; Y10T428/249921; Y10T428/249924; Y10T428/24994; Y10T428/249942; Y10T428/249953; Y10T428/249961; Y10T428/249981; Y10T428/249987; Y10T428/249988; Y10T428/249989
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
91 words
A cryogenic heat insulating structure, which comprises: a wall on whose surfce is coated a plurality of superposed rigid resin foam layers each of which has a surface skin layer of a thickness of from 0.2 to 0.6 mm having a surface membrane free of rigid foam which skin layers possess a density gradient between the maximum density of the resin and the density of the foam layer, wherein each foam layer is formed by simultaneously spraying a fiber and a foamable resin, and contains fibers oriented parallel to said wall.
Claim 2
Dependent Claim
91 words
A cryogenic heat insulating structure, which comprises: a wall on whose surfce is coated a plurality of superposed rigid resin foam layers each of which has a surface skin layer of a thickness of from 0.2 to 0.6 mm having a surface membrane free of rigid foam which skin layers possess a density gradient between the maximum density of the resin and the density of the foam layer, wherein each foam layer is formed by simultaneously spraying a fiber and a foamable resin, and contains fibers oriented parallel to said wall.
Claim 3
Dependent Claim
18 words
The insulating structure of claim 1, wherein said fibers are glass fibers having a length of 10-100 mm.
Claim 4
Dependent Claim
18 words
The insulating structure of claim 1, wherein each foam layer contains from 1-10 weight percent of said fibers.
Claim 5
Dependent Claim
107 words
A cryogenic heat insulating structure which comprises: a wall on whose inner surface is coated at least one fiberless rigid resin foam layer disposed between said wall and a plurality of superposed rigid resin foam layers, each of said layers possessing a surface skin layer of a thickness of from 0.2 to 0.6 mm having a surface membrane free of rigid foam which skin layers possess a density gradient between the maximum density of the resin and the density of the foam layer, wherein each superposed foam layer is formed by simultaneously spraying a fiber and a foamable resin and contains fibers oriented parallel to said wall.
Claim 6
Dependent Claim
107 words
A cryogenic heat insulating structure which comprises: a wall on whose inner surface is coated at least one fiberless rigid resin foam layer disposed between said wall and a plurality of superposed rigid resin foam layers, each of said layers possessing a surface skin layer of a thickness of from 0.2 to 0.6 mm having a surface membrane free of rigid foam which skin layers possess a density gradient between the maximum density of the resin and the density of the foam layer, wherein each superposed foam layer is formed by simultaneously spraying a fiber and a foamable resin and contains fibers oriented parallel to said wall.
Claim 7
Dependent Claim
22 words
The insulating structure of claim 4, wherein a barrier is disposed between said fiber-containing foam layers and said fiberless, rigid foam layer.
Claim 8
Dependent Claim
105 words
A cryogenic heating insulating structure which comprises: a wall on whose outer surface is coated a plurality of superposed rigid fiber containing resin foams layers and then at least one fiberless rigid resin foam layer, each of which layers has a surface skin layer of a thickness from 0.2 to 0.6 mm having a surface membrane free of rigid foam which skin layers possess a density gradient between the maximum density of the resin and the density of the foam layer, wherein each superposed foam layer is formed by simultaneously spraying a fiber and a foamable resin, and contains fibers oriented parallel to said wall.
Claim 9
Dependent Claim
105 words
A cryogenic heating insulating structure which comprises: a wall on whose outer surface is coated a plurality of superposed rigid fiber containing resin foams layers and then at least one fiberless rigid resin foam layer, each of which layers has a surface skin layer of a thickness from 0.2 to 0.6 mm having a surface membrane free of rigid foam which skin layers possess a density gradient between the maximum density of the resin and the density of the foam layer, wherein each superposed foam layer is formed by simultaneously spraying a fiber and a foamable resin, and contains fibers oriented parallel to said wall.
Claim 10
Dependent Claim
22 words
The insulating structure of claim 6, wherein a barrier is disposed between said fiber-containing foam layers and said fiberless, rigid foam layer.
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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) | 1980-08-22 | 1981-02-21 | 1981-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-08-22 | 1985-02-21 | 1985-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-08-22 | 1989-02-21 | 1989-08-23 | $7700.00 | Window Closed / Lapsed |