US3197346A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat treatment of ferrous metals with fluidized particles
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1962-02-27
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Granted: 1965-07-27
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Expires: 1982-02-27
Abstract
No abstract record available.
Inventors
- 👤 John C Munday
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 02:21
CPC Classifications
C; C21; C21D; C21D1/00; C21D1/34; C21D1/53
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
103 words
THE METHOD OF ALTERING THE SURFACE OF A FERROUS METAL OBJECT WHICH COMPRISES INTRODUCING A GAS TO A VESSEL CONTAINING A MULTIPLICITY OF FINELY-DIVIDED CARBONA-CEOUS SOLID PARTICLES SUBSTANTIALLY INCOMBUSTIBLE UNDER THE CONDITIONS OF THE TREATMENT AND REACTIVE WITH THE SURFACE OF SAID FERROUS METAL OBJECT AT A RATE SUITABLE TO FLUIDIZE SAID SOLID PARTICLES, INTRODUCING A FERROUS METAL OBJECT INTO THE SAID VESSEL AND SUBMERGING IT IN SAID FLUIDIZED SOLID PARTICLES AT A REGION SPACED FROM SAID VESSEL, MAINTAINING THE TEMPERATURE OF SAID FLUIDIZED SOLID PARTICLES AT A TEMPERATURE BETWEEN ABOUT 1450*F.AND 1750*F. AND THEREAFTER WITHDRAWING SAID FERROUS METAL OBJECT FROM SAID VESSEL.
Claim 2
Independent Claim
103 words
THE METHOD OF ALTERING THE SURFACE OF A FERROUS METAL OBJECT WHICH COMPRISES INTRODUCING A GAS TO A VESSEL CONTAINING A MULTIPLICITY OF FINELY-DIVIDED CARBONA-CEOUS SOLID PARTICLES SUBSTANTIALLY INCOMBUSTIBLE UNDER THE CONDITIONS OF THE TREATMENT AND REACTIVE WITH THE SURFACE OF SAID FERROUS METAL OBJECT AT A RATE SUITABLE TO FLUIDIZE SAID SOLID PARTICLES, INTRODUCING A FERROUS METAL OBJECT INTO THE SAID VESSEL AND SUBMERGING IT IN SAID FLUIDIZED SOLID PARTICLES AT A REGION SPACED FROM SAID VESSEL, MAINTAINING THE TEMPERATURE OF SAID FLUIDIZED SOLID PARTICLES AT A TEMPERATURE BETWEEN ABOUT 1450*F.AND 1750*F. AND THEREAFTER WITHDRAWING SAID FERROUS METAL OBJECT FROM SAID VESSEL.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-07-26 | 1969-01-25 | 1969-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-07-26 | 1973-01-25 | 1973-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-07-26 | 1977-01-25 | 1977-07-27 | $7700.00 | Window Closed / Lapsed |