US3942331A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cryogenic tank
Assignee: Dow Chemical Co
•
Filing: 1974-07-08
•
Granted: 1976-03-09
•
Expires: 1994-07-08
Abstract
Abstract An improved cryogenic tank is provided which has insulation secured to the inner surface of the tank and a relatively thin sealing membrane within the tank to contain cryogenic liquid. Space containing the insulation is maintained at a reduced pressure sufficient to maintain the insulation in engagement with the outer tank wall.
Inventors
- 👤 Ritchey O. Newman, Jr.
- 👤 Thomas W. McCullough
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:19
CPC Classifications
F; F17; F17C; F17C3/00; F17C3/02; F17C2201/00; F17C2201/01; F17C2201/0128; F17C2201/0176; F17C2203/00; F17C2203/03; F17C2203/0304; F17C2203/0329; F17C2203/0333; F17C2203/0345; F17C2203/0391; F17C2203/06; F17C2203/0602; F17C2203/0604; F17C2203/0612; F17C2203/0626; F17C2203/0629; F17C2203/0634; F17C2203/0636; F17C2203/0646; F17C2203/0658; F17C2203/0663; F17C2203/0673; F17C2203/068; F17C2203/0685; F17C2205/00; F17C2205/03; F17C2205/0302; F17C2205/0323; F17C2209/00; F17C2209/22; F17C2209/227; F17C2223/00; F17C2223/01; F17C2223/0146; F17C2223/0153; F17C2223/0161; F17C2223/03; F17C2223/033; F17C2260/00; F17C2260/03; F17C2260/031; F17C2260/033; F17C2260/035; F17C2260/038; Y; Y10; Y10S; Y10S220/00; Y10S220/901; Y10S220/902
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
152 words
In a cryogenic container, the cryogenic container comprising: an exterior container wall and an interior container wall, the interior container wall being thin, deformable and flexible relative to the exterior container wall, the interior and exterior container walls being in generally fixed spaced apart relationship, a synthetic resinous cellular foam insulation being disposed between the interior container wall and the exterior container wall, the container having closure means, the improvement which comprises a conduit in operative communication with space between the interior container wall and the exterior container wall, the conduit being located generally adjacent to the exterior container wall, the conduit being in combination with means to maintain a subatmospheric pressure between the interior wall and the exterior wall, said pressure being sufficient to distend the interior container wall and exert sufficient pressure on the insulation to maintain said insulation in contact with an inner surface of the exterior container wall.
Claim 2
Dependent Claim
152 words
In a cryogenic container, the cryogenic container comprising: an exterior container wall and an interior container wall, the interior container wall being thin, deformable and flexible relative to the exterior container wall, the interior and exterior container walls being in generally fixed spaced apart relationship, a synthetic resinous cellular foam insulation being disposed between the interior container wall and the exterior container wall, the container having closure means, the improvement which comprises a conduit in operative communication with space between the interior container wall and the exterior container wall, the conduit being located generally adjacent to the exterior container wall, the conduit being in combination with means to maintain a subatmospheric pressure between the interior wall and the exterior wall, said pressure being sufficient to distend the interior container wall and exert sufficient pressure on the insulation to maintain said insulation in contact with an inner surface of the exterior container wall.
Claim 3
Dependent Claim
18 words
The container of claim 1 wherein the conduit is in communication with passageways formed within the foam insulation.
Claim 4
Dependent Claim
43 words
The container of claim 1 including a plurality of conduits external to the exterior wall, wherein said external conduits are each in communication with a conduit formed within the insulation which are in communication with space between the interior and exterior container walls.
Claim 5
Dependent Claim
24 words
The container of claim 1 including a fibrous thermally insulating material disposed between the inner wall and the outer wall adjacent the foam insulation.
References Cited (Backward Citations)
US2593916A
Cited
US2969092A
Cited
US3147878A
Cited
US3018016A
Cited
US3130561A
Cited
US3231125A
Cited
US3257265A
Cited
US3114469A
Cited
US3256000A
Cited
US3395548A
Cited
US3627164A
Cited
US3655086A
Cited
US3695483A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-03-09 | 1979-09-08 | 1980-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-03-09 | 1983-09-08 | 1984-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-03-09 | 1987-09-08 | 1988-03-09 | $7700.00 | Window Closed / Lapsed |