US2699387A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for the transformation of pulverulent solids
Assignee: Freeport Minerals Corp
•
Filing: 1951-03-30
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Granted: 1955-01-11
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Expires: 1971-03-30
Abstract
No abstract record available.
Inventors
- 👤 William H Osborn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:22
CPC Classifications
C; C21; C21B; C21B13/00; C21B13/0033; Y; Y02; Y02P; Y02P10/00; Y02P10/10; Y02P10/134
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
115 words
THE PROCESS OF PRODUCING POWDERED IRON FROM IRON SULFIDE MATERIAL WHICH COMPRISES PASSING PULVERULENT IRON SULFIDE MATERIAL IN A FLUIDIZED STATE BY MEANS OF A GAS CONTAINING OXYGEN THROUGH A FIRST ELONGATED HORIZONTAL CHANNEL TO EFFECT THE SUBSTANTIAL COMPLETE CALCINING OF THE IRON FULFIDE MATERIAL TO IRON OXIDE, PASSING THE RESULTING PULVERULENT SOLID IN A FLUIDIZED STATE BY MEANS OF A REDUCING GAS THROUGH AN ADJACENT ELONGATED HORIZONTAL CHANNEL SEPARATED FROM SAID FIRST CHANNEL BY A HEAT CONDUCTING WALL TO CONVERT THE IRON OXIDE TO METALLIC IRON AND UTILIZING THE HEAT GENERATED IN SAID FIRST CHANNEL TO BE CONDUCTED THROUGH SAID HEAT CONDUCTING WALL TO ASSIST IN EFFECTING THE TRANSFORMATION EFFECTED IN SAID ADJACENT CHANNEL.
Claim 2
Dependent Claim
115 words
THE PROCESS OF PRODUCING POWDERED IRON FROM IRON SULFIDE MATERIAL WHICH COMPRISES PASSING PULVERULENT IRON SULFIDE MATERIAL IN A FLUIDIZED STATE BY MEANS OF A GAS CONTAINING OXYGEN THROUGH A FIRST ELONGATED HORIZONTAL CHANNEL TO EFFECT THE SUBSTANTIAL COMPLETE CALCINING OF THE IRON FULFIDE MATERIAL TO IRON OXIDE, PASSING THE RESULTING PULVERULENT SOLID IN A FLUIDIZED STATE BY MEANS OF A REDUCING GAS THROUGH AN ADJACENT ELONGATED HORIZONTAL CHANNEL SEPARATED FROM SAID FIRST CHANNEL BY A HEAT CONDUCTING WALL TO CONVERT THE IRON OXIDE TO METALLIC IRON AND UTILIZING THE HEAT GENERATED IN SAID FIRST CHANNEL TO BE CONDUCTED THROUGH SAID HEAT CONDUCTING WALL TO ASSIST IN EFFECTING THE TRANSFORMATION EFFECTED IN SAID ADJACENT CHANNEL.
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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) | 1958-01-10 | 1958-07-12 | 1959-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-01-10 | 1962-07-12 | 1963-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-01-10 | 1966-07-12 | 1967-01-11 | $7700.00 | Window Closed / Lapsed |