US2496248A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Internal-combustion engine valve
Assignee: Armco Inc
•
Filing: 1948-08-25
•
Granted: 1950-01-31
•
Expires: 1968-08-25
Abstract
No abstract record available.
Inventors
- 👤 Paul A Jennings
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:15
CPC Classifications
C; C22; C22C; C22C38/00; C22C38/18; C22C38/40; C22C38/44
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
66 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 0.35% TO 1.0% CARBON, ABOUT 15% TO 30% CHROMIUM, ABOUT 4.5% TO 20% NICKEL, ABOUT 1% TO 4.5% MOLYBDENUM, ALL IN SUCH PROPORTIONS AS TO ASSURE A SUBSTANTIALLY FULLY AUSTENITIC STRUCTURE, SILICON NOT EXCEEDING ABOUT 0.15%, AND THE REMAINDER SUBSTANTIALLY ALL IRON.
Claim 2
Dependent Claim
66 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 0.35% TO 1.0% CARBON, ABOUT 15% TO 30% CHROMIUM, ABOUT 4.5% TO 20% NICKEL, ABOUT 1% TO 4.5% MOLYBDENUM, ALL IN SUCH PROPORTIONS AS TO ASSURE A SUBSTANTIALLY FULLY AUSTENITIC STRUCTURE, SILICON NOT EXCEEDING ABOUT 0.15%, AND THE REMAINDER SUBSTANTIALLY ALL IRON.
References Cited (Backward Citations)
US1587614A
Cited
US2163561A
Cited
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 |