US2495731A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stainless steel resistant to leaded fuels at high temperatures
Assignee: Armco Inc
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Filing: 1948-04-07
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Granted: 1950-01-31
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Expires: 1968-04-07
Abstract
No abstract record available.
Inventors
- 👤 Paul A Jennings
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 00:05
CPC Classifications
C; C22; C22C; C22C38/00; C22C38/18; C22C38/40; C22C38/58
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
67 words
STAINLESS STEEL HAVING SUBSTANTIAL HARDNESS AT HIGH TEMPERATURES AND SUBSTANTIAL RESISTANCE TO CORROSION IN THE PRESENCE OF LEADED FUEL COMBUSTION PRODUCTS, AND CONTAINING ABOUT 0.40% TO 1.50% CARBON, ABOUT 12% TO 35% CHROMIUM, ABOUT 2% TO 35% NICKEL, ABOUT 3% TO 12% MANGANESE, ALL IN SUCH RELATIVE PROPORTIONS AS TO ASSURE A SUBSTANTIALLY FULLY AUSTENITIC STRUCTURE, SILICON NOT EXCEEDING ABOUT 0.25%, AND THE REMAINDER SUBSTANTIALLY ALL IRON.
Claim 2
Dependent Claim
67 words
STAINLESS STEEL HAVING SUBSTANTIAL HARDNESS AT HIGH TEMPERATURES AND SUBSTANTIAL RESISTANCE TO CORROSION IN THE PRESENCE OF LEADED FUEL COMBUSTION PRODUCTS, AND CONTAINING ABOUT 0.40% TO 1.50% CARBON, ABOUT 12% TO 35% CHROMIUM, ABOUT 2% TO 35% NICKEL, ABOUT 3% TO 12% MANGANESE, ALL IN SUCH RELATIVE PROPORTIONS AS TO ASSURE A SUBSTANTIALLY FULLY AUSTENITIC STRUCTURE, SILICON NOT EXCEEDING ABOUT 0.25%, AND THE REMAINDER SUBSTANTIALLY ALL IRON.
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) | 1953-01-30 | 1953-08-01 | 1954-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-01-30 | 1957-08-01 | 1958-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-01-30 | 1961-08-01 | 1962-01-31 | $7700.00 | Window Closed / Lapsed |