US2686116A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Age hardening austenitic steel
Assignee: Crucible Steel Company of America
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Filing: 1952-06-18
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Granted: 1954-08-10
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Expires: 1972-06-18
Abstract
No abstract record available.
Inventors
- 👤 Schempp Reinhold
- 👤 Payson Peter
- 👤 Chow Joe Gin-Young
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:36
CPC Classifications
C; C22; C22C; C22C38/00; C22C38/002
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
107 words
AGE HARDENABLE AUSTENTIC STEEL CHARACTERIZED IN BEING HARDENABLE TO A MINIMUM OF ABOUT "C" 32 ROCKWELL AFTER SOLUTION TREATMENT AT A TEMPERATURE NO HIGHER THAN 2200* F. AND SUBSEQUENT AGING AT ABOUT 1300* F. FOR ABOUT 15 HOURS, SAID STEEL CONTAINING ABOUT: 0.3 TO 1.5% CARBON; 0.15 TO 1% PHOSPHORUS; 0.5 TO 15% MANGANESE; 3 TO 25% NICKEL, THE SUM OF NICKEL AND MANGANESE BEING ABOUT 9 TO 30%; 15 TO 30% CHROMIUM; UP TO ABOUT 3% SILICON; UP TO ABOUT 3% OF METAL SELECTED FROM THE GROUP CONSISTING OF MOLYBDENUM AND TUNGSTEN; UP TO ABOUT 0.4% NITROGEN; UP TO ABOUT 0.3% SULFUR; AND THE BALANCE IRON.
Claim 2
Dependent Claim
107 words
AGE HARDENABLE AUSTENTIC STEEL CHARACTERIZED IN BEING HARDENABLE TO A MINIMUM OF ABOUT "C" 32 ROCKWELL AFTER SOLUTION TREATMENT AT A TEMPERATURE NO HIGHER THAN 2200* F. AND SUBSEQUENT AGING AT ABOUT 1300* F. FOR ABOUT 15 HOURS, SAID STEEL CONTAINING ABOUT: 0.3 TO 1.5% CARBON; 0.15 TO 1% PHOSPHORUS; 0.5 TO 15% MANGANESE; 3 TO 25% NICKEL, THE SUM OF NICKEL AND MANGANESE BEING ABOUT 9 TO 30%; 15 TO 30% CHROMIUM; UP TO ABOUT 3% SILICON; UP TO ABOUT 3% OF METAL SELECTED FROM THE GROUP CONSISTING OF MOLYBDENUM AND TUNGSTEN; UP TO ABOUT 0.4% NITROGEN; UP TO ABOUT 0.3% SULFUR; AND THE BALANCE IRON.
References Cited (Backward Citations)
US2528637A
Cited
US2495731A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-08-09 | 1958-02-08 | 1958-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-08-09 | 1962-02-08 | 1962-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-08-09 | 1966-02-08 | 1966-08-10 | $7700.00 | Window Closed / Lapsed |