Patent US2874037A successfully refreshed from Google Patents.
US2874037A
Expired / Lapsed
US
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Process for stabilizing pyrophoric iron
Assignee: Gulf Oil Corp
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Filing: 1957-12-18
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Granted: 1959-02-17
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Expires: 1977-12-18
Abstract
No abstract record available.
Inventors
- 👤 Earl E Fisher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:16
CPC Classifications
C; C21; C21B; C21B13/00; C21B13/0086; Y; Y02; Y02P; Y02P10/00; Y02P10/10; Y02P10/134
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
121 words
THE PROCESS OF STABLIZING METALLIC IRON PRODUCED BY DIRECT REDUCTION OF IRON ORE WITH A REDUCING GAS AT AN ELEVATED PRESSURE AND AN ELEVATED TEMPERATURE BELOW THE FUSION TEMPERATURE OF SAID ORE COMPRISING PRECOOLING THE HOT, FRESHLY REDUCED METALLIC IRON TO A TEMPERATURE IN THE RANGE OF ABOUT 210* TO 400* F., AND THEN IMMERSING THE PRECOOLED METALLIC IRON IN A STABILIZING BATH OF A RELATIVELY HIGH BOILING MINERAL OIL AT A TEMPERATURE NOT GREATER THAN ABOUT 400* F. BUT SUFFICIENT TO REDUCE THE SURFACE TENSION OF THE OIL TO A VALUE NOT EXCEEDING 34 DYNES PER CENTIMETER AND SUCH THAT 250 GRAMS OF THE THUS-STABILIZED IRON IN BOILING WATER WILL NOT LIBERATE MORE THAN 0.5 MILLILITER OF HYDROGEN PER SECOND.
Claim 2
Dependent Claim
121 words
THE PROCESS OF STABLIZING METALLIC IRON PRODUCED BY DIRECT REDUCTION OF IRON ORE WITH A REDUCING GAS AT AN ELEVATED PRESSURE AND AN ELEVATED TEMPERATURE BELOW THE FUSION TEMPERATURE OF SAID ORE COMPRISING PRECOOLING THE HOT, FRESHLY REDUCED METALLIC IRON TO A TEMPERATURE IN THE RANGE OF ABOUT 210* TO 400* F., AND THEN IMMERSING THE PRECOOLED METALLIC IRON IN A STABILIZING BATH OF A RELATIVELY HIGH BOILING MINERAL OIL AT A TEMPERATURE NOT GREATER THAN ABOUT 400* F. BUT SUFFICIENT TO REDUCE THE SURFACE TENSION OF THE OIL TO A VALUE NOT EXCEEDING 34 DYNES PER CENTIMETER AND SUCH THAT 250 GRAMS OF THE THUS-STABILIZED IRON IN BOILING WATER WILL NOT LIBERATE MORE THAN 0.5 MILLILITER OF HYDROGEN PER SECOND.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-02-16 | 1962-08-18 | 1963-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-02-16 | 1966-08-18 | 1967-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-02-16 | 1970-08-18 | 1971-02-17 | $7700.00 | Window Closed / Lapsed |