US2759863A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process and apparatus for carburizing
Assignee: Metallurgical Processes Co
•
Filing: 1951-11-29
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Granted: 1956-08-21
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Expires: 1971-11-29
Abstract
No abstract record available.
Inventors
- 👤 Harold J Ness
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:16
CPC Classifications
C; C21; C21D; C21D1/00; C21D1/74
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
97 words
THE METHOD OF HEATING METAL IN THE WORK CHAMBER OF A METAL HEATING FURNACE AND PRODUCING A GASEOUS ATMOSPHERE THEREIN, COMPRISING EXOTHERMICALLY REACTING AIR AND A HYDROCARBON FUEL EXTERNALLY OF SAID CHAMBER TO PRODUCE HOT GASEOUS REACTION PRODUCTS, ADDING LITHIUM CARBONATE TO SAID HOT REACTION PRODUCTS, INTRODUCING THE HOT LITHIATED REACTION PRODUCTS INTO THE CHAMBER TO IMPART HEAT THERETO, ADDING AN UNREACTED HYDROCARBON GAS TO SAID CHAMBER AND ULTILIZING SAID HEAT TO RAISE THE TEMPERATURE OF SAID METAL TO THE DESIRED DEGREE AND TO ENDOTHERMATICALLY CRACK SAID UNREACTED HYDROCARBON GAS TO PRODUCE NASCENT CARBON IN SAID CHAMBER.
Claim 2
Independent Claim
97 words
THE METHOD OF HEATING METAL IN THE WORK CHAMBER OF A METAL HEATING FURNACE AND PRODUCING A GASEOUS ATMOSPHERE THEREIN, COMPRISING EXOTHERMICALLY REACTING AIR AND A HYDROCARBON FUEL EXTERNALLY OF SAID CHAMBER TO PRODUCE HOT GASEOUS REACTION PRODUCTS, ADDING LITHIUM CARBONATE TO SAID HOT REACTION PRODUCTS, INTRODUCING THE HOT LITHIATED REACTION PRODUCTS INTO THE CHAMBER TO IMPART HEAT THERETO, ADDING AN UNREACTED HYDROCARBON GAS TO SAID CHAMBER AND ULTILIZING SAID HEAT TO RAISE THE TEMPERATURE OF SAID METAL TO THE DESIRED DEGREE AND TO ENDOTHERMATICALLY CRACK SAID UNREACTED HYDROCARBON GAS TO PRODUCE NASCENT CARBON IN SAID CHAMBER.
References Cited (Backward Citations)
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US2310991A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-08-21 | 1960-02-20 | 1960-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-08-21 | 1964-02-20 | 1964-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-08-21 | 1968-02-20 | 1968-08-21 | $7700.00 | Window Closed / Lapsed |