US2496245A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Internal-combustion engine valve
Assignee: Armco Inc
•
Filing: 1948-04-06
•
Granted: 1950-01-31
•
Expires: 1968-04-06
Abstract
No abstract record available.
Inventors
- 👤 Paul A Jennings
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 20:58
CPC Classifications
C; C22; C22C; C22C38/00; C22C38/60
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
77 words
CHROMIUM-NICKEL STAINLESS STEEL HAVING SUBSTANTIAL HARDNESS AT HIGH TEMPERATURES AND LOW STRETCH IN COMBINATION WITH SUBSTANTIAL RESISTANCE TO CORROSION AT HIGH TEMPERATURES IN THE PRESENCE OF LEADED FUEL COMBUSTION PRODUCTS, AND CONTAINING ABOUT 0.08% TO 1.50% CARBON, ABOUT 12% TO 30% CHROMIUM, 2% TO 35% NICKEL, ALL IN SUCH PROPORTIONS AS TO ASSURE A SUBSTANTIALLY FULLY AUSTENITIC STRUCTURE, SILICON NOT EXCEEDING ABOUT 0.20%, 0.15% TO 0.50% SULPHUR, PHOSPHORUS NOT EXCEEDING 0.04%, AND THE REMAINDER SUBSTANTIALLY ALL IRON.
Claim 2
Dependent Claim
77 words
CHROMIUM-NICKEL STAINLESS STEEL HAVING SUBSTANTIAL HARDNESS AT HIGH TEMPERATURES AND LOW STRETCH IN COMBINATION WITH SUBSTANTIAL RESISTANCE TO CORROSION AT HIGH TEMPERATURES IN THE PRESENCE OF LEADED FUEL COMBUSTION PRODUCTS, AND CONTAINING ABOUT 0.08% TO 1.50% CARBON, ABOUT 12% TO 30% CHROMIUM, 2% TO 35% NICKEL, ALL IN SUCH PROPORTIONS AS TO ASSURE A SUBSTANTIALLY FULLY AUSTENITIC STRUCTURE, SILICON NOT EXCEEDING ABOUT 0.20%, 0.15% TO 0.50% SULPHUR, PHOSPHORUS NOT EXCEEDING 0.04%, AND THE REMAINDER SUBSTANTIALLY ALL IRON.
References Cited (Backward Citations)
GB140509A
Cited
CH123017A
Cited
FR688359A
Cited
GB343283A
Cited
US2163561A
Cited
US2159725A
Cited
US2337049A
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 |