Patent US440763A successfully refreshed from Google Patents.
Patent US3215565A successfully refreshed from Google Patents.
US3215565A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High energy rate processing of ferrous alloys in the metastable austenitic condition
Assignee: Individual
•
Filing: 1964-12-24
•
Granted: 1965-11-02
•
Expires: 1984-12-24
Abstract
No abstract record available.
Inventors
- 👤 Richard F Harvey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 09:42
CPC Classifications
B; B21; B21D; B21D26/00; B21D26/02; B21D26/06; B21D26/08; C; C21; C21D; C21D8/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
120 words
THE METHOD OF HARDENING A QUENCH HARDENABLE FERROUS ALLOY BY HIGH VELOCITY DEFORMATION OF METASTABLE AUSTENITE, COMPRISING THE STEPS OF HEATING THE FERROUS ALLOY ABOVE ITS CRITICAL TEMPERATURE TO RENDER IT AUSTENITIC, COOLING THE SAID FERROUS ALLOY AT A RATE GREATER THAN ITS CRITICAL COOLING RATE TO A TEMPERATURE RANGE BELOW THE TEMPERATURE OF PEARLITE FORMATION BUT ABOVE THE TEMPERATURE OF MARTENSITE FORMATION, HOLDING THE SAID FERROUS ALLOY IN THE STATED TEMPERATURE RANGE FOR A TIME INSUFFICIENT TO FORM BAINITE, SUBJECTING THE FERROUS ALLOY TO EXPLOSIVE SHOCKING TO RESULT IN A DISPLACEMENT VELOCITY OF ABOUT 50 TO 200 FT. PER SECOND AT A DEFORMATION RANGE OF ABOUT 70% TO 95% AND FINALLY COOLING THE SAID FERROUS ALLOY TO ROOM TEMPERATURE.
Claim 2
Independent Claim
120 words
THE METHOD OF HARDENING A QUENCH HARDENABLE FERROUS ALLOY BY HIGH VELOCITY DEFORMATION OF METASTABLE AUSTENITE, COMPRISING THE STEPS OF HEATING THE FERROUS ALLOY ABOVE ITS CRITICAL TEMPERATURE TO RENDER IT AUSTENITIC, COOLING THE SAID FERROUS ALLOY AT A RATE GREATER THAN ITS CRITICAL COOLING RATE TO A TEMPERATURE RANGE BELOW THE TEMPERATURE OF PEARLITE FORMATION BUT ABOVE THE TEMPERATURE OF MARTENSITE FORMATION, HOLDING THE SAID FERROUS ALLOY IN THE STATED TEMPERATURE RANGE FOR A TIME INSUFFICIENT TO FORM BAINITE, SUBJECTING THE FERROUS ALLOY TO EXPLOSIVE SHOCKING TO RESULT IN A DISPLACEMENT VELOCITY OF ABOUT 50 TO 200 FT. PER SECOND AT A DEFORMATION RANGE OF ABOUT 70% TO 95% AND FINALLY COOLING THE SAID FERROUS ALLOY TO ROOM TEMPERATURE.
References Cited (Backward Citations)
US2717846A
Cited
US2934463A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-11-01 | 1969-05-03 | 1969-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-01 | 1973-05-03 | 1973-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-01 | 1977-05-03 | 1977-11-02 | $7700.00 | Window Closed / Lapsed |