US2914401A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alloy steel
Assignee: Crucible Steel Company of America
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Filing: 1958-02-24
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Granted: 1959-11-24
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Expires: 1978-02-24
Abstract
No abstract record available.
Inventors
- 👤 Payson Peter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 00:48
CPC Classifications
C; C22; C22C; C22C38/00; C22C38/18; C22C38/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
82 words
3. A JAIL BAR CONSISTING ESSENTIALLY OF ABOUT .60 TO .70% CARBON, ABOAUT .90 TO 1.20% MANGANESE, ABOUT 1.40 TO 1.80% SILICON ABOUT 1.30 TO 1.90% CHROMIUM, ABOUT .60 TO 100% MOLYBDENUM,A ND THE REMAINDER IRON WITH THE USUAL IMPRURITIES, CHARACTERIZED IN BEING HARDENED IN SECTIONS UP TO ABOUT 11/2 INCHES IN DIAMETER TO A MINIMUM OF ABOUT ROCKWELL "C" 63 BY MAINTAINING THE SAME WITHIN THE APPROXIMATE TEMPERATURE RANGE OF 1600 TO 1700*F. FOR ABOUT ONE HOUR AND THEREAFTER AIR COOLING.
Claim 2
Dependent Claim
82 words
3. A JAIL BAR CONSISTING ESSENTIALLY OF ABOUT .60 TO .70% CARBON, ABOAUT .90 TO 1.20% MANGANESE, ABOUT 1.40 TO 1.80% SILICON ABOUT 1.30 TO 1.90% CHROMIUM, ABOUT .60 TO 100% MOLYBDENUM,A ND THE REMAINDER IRON WITH THE USUAL IMPRURITIES, CHARACTERIZED IN BEING HARDENED IN SECTIONS UP TO ABOUT 11/2 INCHES IN DIAMETER TO A MINIMUM OF ABOUT ROCKWELL "C" 63 BY MAINTAINING THE SAME WITHIN THE APPROXIMATE TEMPERATURE RANGE OF 1600 TO 1700*F. FOR ABOUT ONE HOUR AND THEREAFTER AIR COOLING.
References Cited (Backward Citations)
GB517118A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-11-23 | 1963-05-25 | 1963-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-23 | 1967-05-25 | 1967-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-23 | 1971-05-25 | 1971-11-24 | $7700.00 | Window Closed / Lapsed |