US4772337A
Expired / Lapsed
US
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Compress gas container of austenite steel alloy
Assignee: Messer Griesheim GmbH
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Filing: 1987-04-10
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Granted: 1988-09-20
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Expires: 2007-04-10
Abstract
Abstract A compress gas container is made from Austenite steel alloy and is later strengthened or stabilized by cryo-deformation. The Austenite steel alloy is a metastable CrNi steel with a combined titanium and niobium content no greater than 0.02% by weight and a carbon content no greater than 0.045% by weight. With the nickel content up to 9.5% by weight, the carbon content is between 0.03% to 0.045%; and with the nickel content between 9.5% and 10%, the carbon content is below 0.03%.
Inventors
- 👤 Martin Kesten
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 10:23
CPC Classifications
F; F17; F17C; F17C1/00; C; C22; C22C; C22C38/00; C22C38/18; C22C38/40; C22C38/44; F17C2201/00; F17C2201/01; F17C2201/0104; F17C2201/0109; F17C2201/05; F17C2201/058; F17C2203/00; F17C2203/06; F17C2203/0602; F17C2203/0612; F17C2203/0626; F17C2203/0629; F17C2203/0634; F17C2203/0636; F17C2203/0639; F17C2203/0643; F17C2203/0648; F17C2205/00; F17C2205/03; F17C2205/0302; F17C2205/0323; F17C2205/0329; F17C2205/0388; F17C2205/0394; F17C2209/00; F17C2209/21; F17C2209/2172; F17C2221/00; F17C2221/01; F17C2221/011; F17C2223/00; F17C2223/01; F17C2223/0107; F17C2223/0123; F17C2223/03; F17C2223/036; F17C2260/00; F17C2260/01; F17C2260/011; F17C2260/012; F17C2260/05; F17C2260/053; F17C2270/00; F17C2270/07; F17C2270/0781
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
107 words
In a compress gas container manufactured from an Austenite steel alloy wherein the virgin container is subsequently strenghtened or solidified by cryo-deformation, the improvement being in that the Austenite steel alloy is a metastable CrNi steel, with a combined titanium and niobium content which is equal to or smaller than 0.02% by weight, and a carbon content which is equal to or smaller than 0.045% by the weight, the carbon content being between 0.03% and 0.045% by weight when the nickel content is up to 9.5% by weight, the carbon content being below 0.03% by weight when the nickel content is between 9.5% and 10% by weight.
Claim 2
Dependent Claim
107 words
In a compress gas container manufactured from an Austenite steel alloy wherein the virgin container is subsequently strenghtened or solidified by cryo-deformation, the improvement being in that the Austenite steel alloy is a metastable CrNi steel, with a combined titanium and niobium content which is equal to or smaller than 0.02% by weight, and a carbon content which is equal to or smaller than 0.045% by the weight, the carbon content being between 0.03% and 0.045% by weight when the nickel content is up to 9.5% by weight, the carbon content being below 0.03% by weight when the nickel content is between 9.5% and 10% by weight.
Claim 3
Dependent Claim
21 words
Compress gas container, according to claim 1, characterized by the fact that the virgin container is polished electrolytically prior to cryo-deformation.
Claim 4
Dependent Claim
102 words
In a process for manufacturing a compress gas container made from Austenite steel alloy wherein the virgin container is subsequently strengthened or stabilized by cryo-deformation, the improvement being using as the Austenite steel alloy a metastabile CrNi steel having a combined titanium and niobium content no greater than 0.02% by weight and a carbon content no greater than 0.045% by weight, using a carbon content between 0.03% and 0.045% by weight when the nickel content is up to 9.5% by weight, and using a carbon content less than 0.03% by weight when the nickel content is between 9.5% and 10% by weight.
Claim 5
Dependent Claim
102 words
In a process for manufacturing a compress gas container made from Austenite steel alloy wherein the virgin container is subsequently strengthened or stabilized by cryo-deformation, the improvement being using as the Austenite steel alloy a metastabile CrNi steel having a combined titanium and niobium content no greater than 0.02% by weight and a carbon content no greater than 0.045% by weight, using a carbon content between 0.03% and 0.045% by weight when the nickel content is up to 9.5% by weight, and using a carbon content less than 0.03% by weight when the nickel content is between 9.5% and 10% by weight.
Claim 6
Dependent Claim
17 words
The process according to claim 3, characterized by the virgin container being polished electrolytically prior to cryo-deformation.
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) | 1991-09-20 | 1992-03-21 | 1992-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-09-20 | 1996-03-21 | 1996-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-09-20 | 2000-03-21 | 2000-09-20 | $7700.00 | Window Closed / Lapsed |