Patent US4607249A successfully refreshed from Google Patents.
US4015437A
Expired / Lapsed
US
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Process for cooling cryocables using a hydrogen slush
Assignee: Messer Griesheim GmbH
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Filing: 1975-05-13
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Granted: 1977-04-05
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Expires: 1995-05-13
Abstract
Abstract A process for cooling cryocables by low-boiling gases includes recooling gases at cooling stations distributed along the length of the cable. The pressure loss of the gases is equalized at pumping stations equally distributed along the length of the cable. A slush of the low-boiling gas is produced and used as the coolant at each cooling station.
Inventors
- 👤 Wolfgang Daus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 00:27
CPC Classifications
H; H01; H01B; H01B7/00; H01B7/17; H01B7/29; H01B12/00; H01B12/16; Y; Y02; Y02E; Y02E40/00; Y02E40/60; Y10; Y10S; Y10S505/00; Y10S505/825; Y10S505/888; Y10S505/899
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
102 words
In a process for cooling cryocables by low-boiling gases, which are recooled at cooling stations distributed along the length of the cable and whose pressure loss is equalized at pumping stations equally distributed along the length of the cable, the improvement comprising producing a slush of the low-boiling gas and using the slush as the coolant at each cooling station by allowing liquid or gas under high pressure to expand in a nozzle alternately to a pressure below the pressure of the triple point thereby producing ice and subsequently to a pressure above the pressure of the triple point thereby producing liquid.
Claim 2
Dependent Claim
102 words
In a process for cooling cryocables by low-boiling gases, which are recooled at cooling stations distributed along the length of the cable and whose pressure loss is equalized at pumping stations equally distributed along the length of the cable, the improvement comprising producing a slush of the low-boiling gas and using the slush as the coolant at each cooling station by allowing liquid or gas under high pressure to expand in a nozzle alternately to a pressure below the pressure of the triple point thereby producing ice and subsequently to a pressure above the pressure of the triple point thereby producing liquid.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-04-04 | 1980-10-04 | 1981-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-04-04 | 1984-10-04 | 1985-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-04-04 | 1988-10-04 | 1989-04-05 | $7700.00 | Window Closed / Lapsed |