US2496247A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High-temperature article
Assignee: Armco Inc
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Filing: 1948-08-04
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Granted: 1950-01-31
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Expires: 1968-08-04
Abstract
No abstract record available.
Inventors
- 👤 Paul A Jennings
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:33
CPC Classifications
C; C22; C22C; C22C38/00; C22C38/18; C22C38/38; C22C38/60
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
70 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 0.08% TO 1.5% CARBON, ABOUT 12% TO 30% CHROMIUM, ABOUT 4% TO 17% MANGANESE, ALL IN SUCH PROPORTIONS AS TO ASSURE A SUBSTANTIALLY FULLY AUSTENITIC STRUCTURE, SILICON NOT EXCEEDING 0.25%, ABOUT 0.04% TO 0.15% SULPHUR, PHOSPHORUS NOT EXCEEDING ABOUT 0.04%, AND THE REMAINDER SUBSTANTIALLY ALL IRON.
Claim 2
Dependent Claim
70 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 0.08% TO 1.5% CARBON, ABOUT 12% TO 30% CHROMIUM, ABOUT 4% TO 17% MANGANESE, ALL IN SUCH PROPORTIONS AS TO ASSURE A SUBSTANTIALLY FULLY AUSTENITIC STRUCTURE, SILICON NOT EXCEEDING 0.25%, ABOUT 0.04% TO 0.15% SULPHUR, PHOSPHORUS NOT EXCEEDING ABOUT 0.04%, AND THE REMAINDER SUBSTANTIALLY ALL IRON.
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 |