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US4846900A
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US
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Process for the production of a compresssed gas container made of austenitic steels by cryodeformation
Assignee: Messer Griesheim GmbH
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Filing: 1988-08-08
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Granted: 1989-07-11
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Expires: 2008-08-08
Abstract
Abstract The invention relates to a process for producing a compressed gas container made of austenitic steels by cryodeformation in which the container is cooled by a refrigerated cooling medium to below the prevailing martensite transformation temperature and is expanded to the desired size by the introduction of a pressure medium into the container. Trichlorofluoromethane is employed as the pressure medium.
Inventors
- 👤 Werner K. Diehl
- 👤 Martin Kesten
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 10:01
CPC Classifications
C; C21; C21D; C21D6/00; C21D6/04; B; B21; B21D; B21D26/00; B21D26/02; B21D26/033; B21D26/041; B21D26/049; C21D7/00; C21D7/02; C21D7/10; C21D7/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
67 words
In a process for the production of a compressed gas container made of austenitic steels by cryodeformation including the steps of cooling the compressed gas container in liquid nitrogen to below the prevailing martensite transformation temperature and expanding the container to the desired size by introducing a pressure medium into the container, the improvement being in that trichlorofluoromethane (CFCL 3 ) is introduced as the pressure medium.
Claim 2
Dependent Claim
67 words
In a process for the production of a compressed gas container made of austenitic steels by cryodeformation including the steps of cooling the compressed gas container in liquid nitrogen to below the prevailing martensite transformation temperature and expanding the container to the desired size by introducing a pressure medium into the container, the improvement being in that trichlorofluoromethane (CFCL 3 ) is introduced as the pressure medium.
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) | 1992-07-10 | 1993-01-09 | 1993-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-07-10 | 1997-01-09 | 1997-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-07-10 | 2001-01-09 | 2001-07-11 | $7700.00 | Window Closed / Lapsed |