US2799604A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of protecting surfaces of hot metallic bodies against oxidation
Assignee: Metallurgical Processes Co
•
Filing: 1950-11-28
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Granted: 1957-07-16
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Expires: 1970-11-28
Abstract
No abstract record available.
Inventors
- 👤 Harold J Ness
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:45
CPC Classifications
C; C21; C21D; C21D1/00; C21D1/74
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
173 words
THE METHOD OF PROTECTING THE SURFACE OF HEATED METAL FROM SCALE WHILE IT IS ENCLOSED IN A FURNACE COMPRISING COMBUSTING A HYDROCARBON FUEL AND AIR MIXTURE IN SAID FURNACE CONTAINING SUFFICIENT AIR TO EFFECT SUBSTANTIALLY COMPLETE COMBUSTION OF SAID FUEL, WHEREBY TO PRODUCE A GASEOUS HEATING ATMOSPHERE IN SAID FURNACE WHICH IS OXIDIZING TO THE SURFACE OF SAID METAL AT ELEVATED TEMPERATURES, SUBJECTING SAID METAL TO THE HEATING EFFECT OF SAID COMBUSTION TO HEAT THE SAME IN SAID ATMOSPHERE TO A TEMPERATURE ABOVE 1200*F., WHILE SAID METAL IS ABOVE SAID TEMPERATURE APPLYING LOCALLY TO THE SURFACE THEREOF TO BE PROTECTED, UNASSOCIATED WITH OXYGEN IN COMBUSTION SUPPORTING AMOUNTS, A HYDROCARBON FUEL IN A SLIGHTLY DISPERSED CONDITION, AND CONTINUING SAID APPLICATION OF HYDROCARBON FUEL TO SAID SURFACE UNTIL SAID FUEL REACTS WITH THE PORTION OF SAID ATMOSPHERE WHICH IS IN CONTACT WITH SUCH SURFACE TO REDUCE THE OXIDIZING NATURE THEREOF AND TO PRODUCE A BODY OF GAS IN CONTACT WITH SAID SURFACE HAVING A COMPOSITION WHICH IS SUBSTANTIALLY LESS OXIDIZING IN NATURE THAN SAID ATMOSPHERE.
Claim 2
Independent Claim
173 words
THE METHOD OF PROTECTING THE SURFACE OF HEATED METAL FROM SCALE WHILE IT IS ENCLOSED IN A FURNACE COMPRISING COMBUSTING A HYDROCARBON FUEL AND AIR MIXTURE IN SAID FURNACE CONTAINING SUFFICIENT AIR TO EFFECT SUBSTANTIALLY COMPLETE COMBUSTION OF SAID FUEL, WHEREBY TO PRODUCE A GASEOUS HEATING ATMOSPHERE IN SAID FURNACE WHICH IS OXIDIZING TO THE SURFACE OF SAID METAL AT ELEVATED TEMPERATURES, SUBJECTING SAID METAL TO THE HEATING EFFECT OF SAID COMBUSTION TO HEAT THE SAME IN SAID ATMOSPHERE TO A TEMPERATURE ABOVE 1200*F., WHILE SAID METAL IS ABOVE SAID TEMPERATURE APPLYING LOCALLY TO THE SURFACE THEREOF TO BE PROTECTED, UNASSOCIATED WITH OXYGEN IN COMBUSTION SUPPORTING AMOUNTS, A HYDROCARBON FUEL IN A SLIGHTLY DISPERSED CONDITION, AND CONTINUING SAID APPLICATION OF HYDROCARBON FUEL TO SAID SURFACE UNTIL SAID FUEL REACTS WITH THE PORTION OF SAID ATMOSPHERE WHICH IS IN CONTACT WITH SUCH SURFACE TO REDUCE THE OXIDIZING NATURE THEREOF AND TO PRODUCE A BODY OF GAS IN CONTACT WITH SAID SURFACE HAVING A COMPOSITION WHICH IS SUBSTANTIALLY LESS OXIDIZING IN NATURE THAN SAID ATMOSPHERE.
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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) | 1960-07-15 | 1961-01-14 | 1961-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-07-15 | 1965-01-14 | 1965-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-07-15 | 1969-01-14 | 1969-07-16 | $7700.00 | Window Closed / Lapsed |