US2914434A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for controlling atmospheres while heat treating steel
Assignee: Individual
•
Filing: 1956-04-11
•
Granted: 1959-11-24
•
Expires: 1976-04-11
Abstract
No abstract record available.
Inventors
- 👤 Harold L Snavely
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:36
CPC Classifications
C; C21; C21D; C21D1/00; C21D1/74; C21D1/76; C23; C23C; C23C8/00; C23C8/06; C23C8/08; C23C8/20; C23C8/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
73 words
A METHOD FOR CONTROLLING THE CARBON POTENTIAL OF A PREEPARED HEAT-TREATING ATMOSPHERE TO OBTAIN A CHARGE OF PREDETERMINED CARBON CONTENT COMPRISING THE STEPS OF PLACING A STEEL SAMPLE OF KNOWN CARBON CONTENT IN A FURNACE, RAISING THE TEMPERATURE OF THE FURNACE TO WITHIN HEAT-TREATING RANGE, INTRODUCING ENDOTHERMIC CARRIER GAS AT A PREDETERMINED LOW RATE, INTRODUCING HYDROCARBON GAS AT A PREDETERMINED LOW RATE, MEASURING THE TEMPERATURE DIFFERENCE BETWEEN THE STEEL SAMPLE AND THE INTERIOR
Claim 2
Independent Claim
73 words
A METHOD FOR CONTROLLING THE CARBON POTENTIAL OF A PREEPARED HEAT-TREATING ATMOSPHERE TO OBTAIN A CHARGE OF PREDETERMINED CARBON CONTENT COMPRISING THE STEPS OF PLACING A STEEL SAMPLE OF KNOWN CARBON CONTENT IN A FURNACE, RAISING THE TEMPERATURE OF THE FURNACE TO WITHIN HEAT-TREATING RANGE, INTRODUCING ENDOTHERMIC CARRIER GAS AT A PREDETERMINED LOW RATE, INTRODUCING HYDROCARBON GAS AT A PREDETERMINED LOW RATE, MEASURING THE TEMPERATURE DIFFERENCE BETWEEN THE STEEL SAMPLE AND THE INTERIOR
References Cited (Backward Citations)
US2279231A
Cited
US2298397A
Cited
US2541857A
Cited
US2459618A
Cited
US2565201A
Cited
US2616296A
Cited
US2703298A
Cited
US2698222A
Cited
US2603578A
Cited
US2646681A
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 |