Patent US2778756A successfully refreshed from Google Patents.
US2778756A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for hardening steel
Assignee: Individual
•
Filing: 1953-06-22
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Granted: 1957-01-22
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Expires: 1973-06-22
Abstract
No abstract record available.
Inventors
- 👤 Bredzs Nikolajs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:44
CPC Classifications
C; C21; C21D; C21D8/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
100 words
THE METHOD OF TREATING A MASS OF HARDENABLE STEEL CONSISTING IN HEATING THE MASS TO A TEMPERATURE AT LEAST SLIGHTLY ABOVE ITS TRANSFORMATION TEMPERATURE TO FORM A HOMOGENEOUS AUSTENITIC STRUCTURE, MAINTAINING SAID ARTICLE AT SUCH TEMPERATURE THROUGHOUT WHILE SIMULTANEOUSLY APPLYING A PRESSURE AMOUNTING TO AT LEAST 15 TONS PER SQUARE CENTIMETER OVER THE SURFACE OF SAID MASS TO MINIMIZE THE FORMATION OF A PEARLITE STRUCTURE UPON COOLING, AND PERMITTING SAID ARTICLE TO COOL AT A MODERATE RATE UNDER THE INFLUENCE OF SAID PRESSURE WHEREBY THE STEEL WILL BE TRANSFORMED DIRECTLY FROM AN AUSTENITIC STRUCTURE TO A SUBSTANTIALLY A MARTENSITIC STRUCTURE.
Claim 2
Independent Claim
100 words
THE METHOD OF TREATING A MASS OF HARDENABLE STEEL CONSISTING IN HEATING THE MASS TO A TEMPERATURE AT LEAST SLIGHTLY ABOVE ITS TRANSFORMATION TEMPERATURE TO FORM A HOMOGENEOUS AUSTENITIC STRUCTURE, MAINTAINING SAID ARTICLE AT SUCH TEMPERATURE THROUGHOUT WHILE SIMULTANEOUSLY APPLYING A PRESSURE AMOUNTING TO AT LEAST 15 TONS PER SQUARE CENTIMETER OVER THE SURFACE OF SAID MASS TO MINIMIZE THE FORMATION OF A PEARLITE STRUCTURE UPON COOLING, AND PERMITTING SAID ARTICLE TO COOL AT A MODERATE RATE UNDER THE INFLUENCE OF SAID PRESSURE WHEREBY THE STEEL WILL BE TRANSFORMED DIRECTLY FROM AN AUSTENITIC STRUCTURE TO A SUBSTANTIALLY A MARTENSITIC STRUCTURE.
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) | 1960-01-22 | 1960-07-23 | 1961-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-01-22 | 1964-07-23 | 1965-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-01-22 | 1968-07-23 | 1969-01-22 | $7700.00 | Window Closed / Lapsed |