Patent US3592634A successfully refreshed from Google Patents.
US3592634A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High-strength corrosion-resistant stainless steel
Assignee: Armco Inc
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Filing: 1968-04-30
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Granted: 1971-07-13
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Expires: 1988-04-30
Abstract
Abstract CHROMIUM-NICKEL-MANGANESE STEEL CHARACTERIZED BY GOOD WELDING PROPERTIES, WHICH STEEL IN THE AS-WELDED CONDITION ENJOYS A COMBINATION OF STRENGTH, DUCTILITY AND IMPACT RESISTANCE, ALONG WITH GOOD RESISTANCE TO INTERGRANULAR CORROSION AND GOOD RESISTANCE TO GENERAL CORROSIVE ATTACK. THE STEEL CONTAINS ABOUT 20% TO 25% CHROMIUM, ABOUT 6% TO 17% NICKEL, ABOUT 3.5% TO 7% MANGANESE, ABOUT .15% TO .50% NITROGEN, WITH CARBON NOT EXCEEDING ABOUT .05, AND WITH AT LEAST ONE OF THE THREE INGREDIENTS MOLYBDENUM, COLUMBIUM AND VANADIUM. FOR A BEST COMBINATION OF PROPERTIES AT LEAST TWO OF THE THREE INGREDIENTS ARE EMPLOYED.
Inventors
- 👤 Elbert E Denhard Jr
- 👤 D Cameron Perry
- 👤 Robert R Gaugh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:44
CPC Classifications
C; C22; C22C; C22C38/00; C22C38/001; C22C38/18; C22C38/40; C22C38/58
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-07-12 | 1975-01-11 | 1975-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-12 | 1979-01-11 | 1979-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-12 | 1983-01-11 | 1983-07-13 | $7700.00 | Window Closed / Lapsed |