US4027379A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of insulating cryogenic vessels
Assignee: Dow Chemical Co
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Filing: 1974-12-23
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Granted: 1977-06-07
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Expires: 1994-12-23
Abstract
Abstract Cryogenic vessels having improved insulation value are prepared by incorporating evacuated tubing within the insulation.
Inventors
- 👤 Chin Huan Cheng
- 👤 Burton D. Brubaker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:17
CPC Classifications
F; F17; F17C; F17C3/00; F17C3/02; F16; F16L; F16L59/00; F16L59/06; F16L59/065; F17C13/00; F17C13/001; F17C2201/00; F17C2201/01; F17C2201/0104; F17C2201/0109; F17C2203/00; F17C2203/03; F17C2203/0304; F17C2203/0329; F17C2203/0333; F17C2203/0391; F17C2203/06; F17C2203/0602; F17C2203/0612; F17C2203/0626; F17C2203/0629; F17C2203/0634; F17C2203/0636; F17C2203/0639; F17C2205/00; F17C2205/03; F17C2205/0302; F17C2205/0352; F17C2221/00; F17C2221/01; F17C2221/014; F17C2223/00; F17C2223/01; F17C2223/0146; F17C2223/0153; F17C2223/0161; F17C2223/03; F17C2223/033; F17C2223/04; F17C2223/042; F17C2223/046; F17C2223/047; F17C2260/00; F17C2260/03; F17C2260/031; F17C2260/033; Y; Y10; Y10S; Y10S220/00; Y10S220/902; Y10S62/00; Y10S62/13; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49879; Y10T29/49888
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
67 words
A method for the formation of a cryogenic vessel, the steps of the method comprising providing a vessel, applying thermal insulation thereto, the improvement which comprises incorporating tubing within at least a portion of the insulation, the tubing containing a gas at an absolute pressure not greater than about one millimeter of mercury absolute, the tubing containing the gas thereby providing improved thermal insulation of the vessel.
Claim 2
Independent Claim
67 words
A method for the formation of a cryogenic vessel, the steps of the method comprising providing a vessel, applying thermal insulation thereto, the improvement which comprises incorporating tubing within at least a portion of the insulation, the tubing containing a gas at an absolute pressure not greater than about one millimeter of mercury absolute, the tubing containing the gas thereby providing improved thermal insulation of the vessel.
Claim 3
Dependent Claim
12 words
The method of claim 1 wherein the thermal insulation is plastic foam.
Claim 4
Dependent Claim
39 words
The method of claim 1 wherein the tubing has a yield strength S in pounds per square inch and a thermal conductivity K in British thermal units (inches/hour/square foot/° F.) and the ratio of S:K is at least 100.
Claim 5
Dependent Claim
14 words
The method of claim 3 wherein the ratio of S:K is at least 1000.
Claim 6
Dependent Claim
12 words
The method of claim 1 wherein the tubing is a plastic tubing.
Claim 7
Dependent Claim
23 words
The method of claim 5 wherein the plastic tubing is adhered to the thermal insulation and the thermal insulation is a plastic foam.
References Cited (Backward Citations)
GB683855A
Cited
US3122891A
Cited
US3018016A
Cited
GB975265A
Cited
US3130561A
Cited
US3257265A
Cited
US3304728A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-06-06 | 1980-12-06 | 1981-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-06-06 | 1984-12-06 | 1985-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-06-06 | 1988-12-06 | 1989-06-07 | $7700.00 | Window Closed / Lapsed |