US2878150A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of forging chromium manganese austenitic steels
Assignee: United States Steel Corp
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Filing: 1954-05-05
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Granted: 1959-03-17
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Expires: 1974-05-05
Abstract
No abstract record available.
Inventors
- 👤 Joseph R Mitchell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 07:15
CPC Classifications
C; C22; C22C; C22C38/00; C22C38/18; C22C38/38; C21; C21D; C21D8/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
81 words
A METHOD OF BLOOMING INGOTS OF AUSTENITIC CHROMIUM MANGANESE STEEL ALLOYS CONTAINING LESS THAN 4% NICKEL CHARACTERIZED BY LESS THAN 2% FERRITE SEGREGATION IN THE ROLLED PRODUCT, COMPRISING SOAKING INGOTS FORMED OF SUCH STEEL AT A TEMPERATURE BETWEEN ABOUT 2025 AND 2075* F. FOR AT LEAST 12 HOURS, THEN RAPIDLY AND UNIFORMLY RAISING THE TEMPERATURE THEREOF TO BETWEEN ABOUT 2125 AND 2175* F. AND THEREAFTER ROLLING THE INGOT SO HEATED TO BLOOMS OF THE DESIRED SIZE WITHOUT INTERMEDIATE HOLDING AND COOLING.
Claim 2
Independent Claim
81 words
A METHOD OF BLOOMING INGOTS OF AUSTENITIC CHROMIUM MANGANESE STEEL ALLOYS CONTAINING LESS THAN 4% NICKEL CHARACTERIZED BY LESS THAN 2% FERRITE SEGREGATION IN THE ROLLED PRODUCT, COMPRISING SOAKING INGOTS FORMED OF SUCH STEEL AT A TEMPERATURE BETWEEN ABOUT 2025 AND 2075* F. FOR AT LEAST 12 HOURS, THEN RAPIDLY AND UNIFORMLY RAISING THE TEMPERATURE THEREOF TO BETWEEN ABOUT 2125 AND 2175* F. AND THEREAFTER ROLLING THE INGOT SO HEATED TO BLOOMS OF THE DESIRED SIZE WITHOUT INTERMEDIATE HOLDING AND COOLING.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-03-16 | 1962-09-15 | 1963-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-16 | 1966-09-15 | 1967-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-16 | 1970-09-15 | 1971-03-17 | $7700.00 | Window Closed / Lapsed |