US2528638A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alloy steel
Assignee: Armco Inc
•
Filing: 1949-06-13
•
Granted: 1950-11-07
•
Expires: 1969-06-13
Abstract
No abstract record available.
Inventors
- 👤 Jr William Charles Clarke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:38
CPC Classifications
C; C22; C22C; C22C38/00; C22C38/002
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
58 words
AUSTENITIC CHROMIUM - NICKEL - PHOSPHORUS STAINLESS STEEL OF GOOD HIGH TEMPERATURE PROPERTIES AND GOOD LOW TEMPERATURE STRENGTH AND WORKING PROPERTIES AS WELL CONTAINING APPROXIMATELY 0.01% TO 0.15% CARBON, 12% TO 22% CHROMIUM, 8% TO 21% NICKEL,, FROM 0.05% TO 0.5% PHOSPHORUS, 1.5% TO 4% MOLYBDENUM, 2% TO 4% COPPER, 0.10% TO 2% MAGANESE, AND THE REMAINDER IRON.
Claim 2
Dependent Claim
58 words
AUSTENITIC CHROMIUM - NICKEL - PHOSPHORUS STAINLESS STEEL OF GOOD HIGH TEMPERATURE PROPERTIES AND GOOD LOW TEMPERATURE STRENGTH AND WORKING PROPERTIES AS WELL CONTAINING APPROXIMATELY 0.01% TO 0.15% CARBON, 12% TO 22% CHROMIUM, 8% TO 21% NICKEL,, FROM 0.05% TO 0.5% PHOSPHORUS, 1.5% TO 4% MOLYBDENUM, 2% TO 4% COPPER, 0.10% TO 2% MAGANESE, AND THE REMAINDER IRON.
References Cited (Backward Citations)
US2251163A
Cited
CH226169A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-11-06 | 1954-05-08 | 1954-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-11-06 | 1958-05-08 | 1958-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-11-06 | 1962-05-08 | 1962-11-07 | $7700.00 | Window Closed / Lapsed |