US2562854A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of improving the high-temperature strength of austenitic steels
Assignee: Union Carbide Corp
•
Filing: 1949-04-22
•
Granted: 1951-07-31
•
Expires: 1969-04-22
Abstract
No abstract record available.
Inventors
- 👤 William O Binder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:25
CPC Classifications
C; C22; C22C; C22C38/00; C22C38/18; C22C38/40; C22C38/32; C22C38/38; C22C38/54
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
89 words
THE METHOD OF IMPROVING THE HIGH-TEMPERATURE STRENGTH OF AUSTENITIC CHROMIUM STEELS CONTAINING AT LEAST 50% IRON, 10% TO 30% CHROMIUM, UP TO 0.5% CARBON AND AT LEAST ONE ELEMENT SELECTED FROM THE GROUP CONSISTING OF NICKEL AND MANGANESE IN A QUANTITY AT LEAST SUFFICIENT TO RENDER SAID STEELS SUBSTANTIALLY COMPLETELY AUSTENITIC WHICH METHOD COMPRISES INCORPORATING 0.005% TO LESS THAN 0.1% BORON IN SUCH STEELS AND WORKING THEM AT AN ELEVATED TEMPERATURE ABOVE 1000* F. BUT BELOW THEIR RECRYSTALLIZATION TEMPERATURE REDUCING SAID STEELS ABOUT 10% TO 40% BY SUCH WORKING
Claim 2
Independent Claim
89 words
THE METHOD OF IMPROVING THE HIGH-TEMPERATURE STRENGTH OF AUSTENITIC CHROMIUM STEELS CONTAINING AT LEAST 50% IRON, 10% TO 30% CHROMIUM, UP TO 0.5% CARBON AND AT LEAST ONE ELEMENT SELECTED FROM THE GROUP CONSISTING OF NICKEL AND MANGANESE IN A QUANTITY AT LEAST SUFFICIENT TO RENDER SAID STEELS SUBSTANTIALLY COMPLETELY AUSTENITIC WHICH METHOD COMPRISES INCORPORATING 0.005% TO LESS THAN 0.1% BORON IN SUCH STEELS AND WORKING THEM AT AN ELEVATED TEMPERATURE ABOVE 1000* F. BUT BELOW THEIR RECRYSTALLIZATION TEMPERATURE REDUCING SAID STEELS ABOUT 10% TO 40% BY SUCH WORKING
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-07-30 | 1955-01-29 | 1955-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-07-30 | 1959-01-29 | 1959-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-07-30 | 1963-01-29 | 1963-07-31 | $7700.00 | Window Closed / Lapsed |