US3048505A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of prehardening austenitic manganese steel
Assignee: Manganese Steel Forge Co
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Filing: 1959-08-12
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Granted: 1962-08-07
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Expires: 1979-08-12
Abstract
No abstract record available.
Inventors
- 👤 Herbert C Doepken
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:54
CPC Classifications
C; C22; C22C; C22C38/00; C22C38/04; C21; C21D; C21D6/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
100 words
A PROCESS OF PREHARDENING AUSTENITIC MANGANESE STEEL TO FORM A STEEL OF SUPERIOR HARDNESS AND DUCTILITY, COMPRISING HEATING AUSTENITIC MANGANESE STEEL TO A TEMPERATURE ABOVE THAT AT WHICH FERRITE GOES UNTO SOLUTION IN THE AUSTENITIC MATRIX AND BELOW THE TEMPERATURE AT WHICH CARBIDE FULLY DISSOLVES INTO THE AUSTENITIC MATRIX, IN ORDER TO PRECIPITATE CARBIDE NEEDLES WITHIN THE GRAINS OF THE STEEL, ALLOWING THE STEEL TO COOL TO AMBIENT TEMPERATURE, HEATING THE STEEL TO A HIGHER TEMPERATURE THAN THAT IN THE IN ORDER TO DIMINISH THE SIZE AND ROUND OFF THE SHARP POINTS OF SAID CARBIDE NEEDLES, AND QUENCHING THE STEEL.
Claim 2
Dependent Claim
100 words
A PROCESS OF PREHARDENING AUSTENITIC MANGANESE STEEL TO FORM A STEEL OF SUPERIOR HARDNESS AND DUCTILITY, COMPRISING HEATING AUSTENITIC MANGANESE STEEL TO A TEMPERATURE ABOVE THAT AT WHICH FERRITE GOES UNTO SOLUTION IN THE AUSTENITIC MATRIX AND BELOW THE TEMPERATURE AT WHICH CARBIDE FULLY DISSOLVES INTO THE AUSTENITIC MATRIX, IN ORDER TO PRECIPITATE CARBIDE NEEDLES WITHIN THE GRAINS OF THE STEEL, ALLOWING THE STEEL TO COOL TO AMBIENT TEMPERATURE, HEATING THE STEEL TO A HIGHER TEMPERATURE THAN THAT IN THE IN ORDER TO DIMINISH THE SIZE AND ROUND OFF THE SHARP POINTS OF SAID CARBIDE NEEDLES, AND QUENCHING THE STEEL.
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) | 1965-08-06 | 1966-02-05 | 1966-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-08-06 | 1970-02-05 | 1970-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-08-06 | 1974-02-05 | 1974-08-07 | $7700.00 | Window Closed / Lapsed |