US3072474A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cokeless smelting of ore
Assignee: Phillips Petroleum Co
•
Filing: 1961-03-21
•
Granted: 1963-01-08
•
Expires: 1981-03-21
Abstract
No abstract record available.
Inventors
- 👤 Robert G Atkinson
- 👤 John W Loy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:15
CPC Classifications
C; C22; C22B; C22B1/00; C22B1/14; C22B1/24; C21; C21B; C21B13/00; C21B13/12; C21B13/14; Y; Y02; Y02P; Y02P10/00; Y02P10/10; Y02P10/134
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
116 words
A PROCESS FOR THE SMELTING OF IRON ORE WHICH COMPRISES SUBJECTING A HEAVY PETROLEUM OIL TO VISCOSITY BREAKING, PRODUCING A STREAM OF VISCOSITY-BROKEN OIL TO OBTAIN A PITCH ING THE STREAM OF VISCOSITY-BROKEN OIL TO OBTAIN A PITCH FRACTION AND A HEAVY OIL FRACTION, CONVERTING A PORTION OF THE HEAVY OIL FRACTION INTO A REDUCING GAS CONTAINING CARBON MONOXIDE AND HYDROGEN, AND CONVERTING AT LEAST ANOTHER PORTION OF SAID HEAVY OIL TO CARBON BLACK, SUBJECTING SAID ORE TO REDUCING CONDITIONS IN THE PRRESENCE OF SAID REDUCING GAS, ADMIXING THE ORE THUS-TREATED WITH SAID PITCH, LIME AND SAID CARBON BLACK, FORMING THE MIXTURE THUS OBTAINED, CALCINING THE FORMED MIXTURE AND SUBJECTING THE FORMED, CALCINED MIXTURE TO SMELTING.
Claim 2
Dependent Claim
116 words
A PROCESS FOR THE SMELTING OF IRON ORE WHICH COMPRISES SUBJECTING A HEAVY PETROLEUM OIL TO VISCOSITY BREAKING, PRODUCING A STREAM OF VISCOSITY-BROKEN OIL TO OBTAIN A PITCH ING THE STREAM OF VISCOSITY-BROKEN OIL TO OBTAIN A PITCH FRACTION AND A HEAVY OIL FRACTION, CONVERTING A PORTION OF THE HEAVY OIL FRACTION INTO A REDUCING GAS CONTAINING CARBON MONOXIDE AND HYDROGEN, AND CONVERTING AT LEAST ANOTHER PORTION OF SAID HEAVY OIL TO CARBON BLACK, SUBJECTING SAID ORE TO REDUCING CONDITIONS IN THE PRRESENCE OF SAID REDUCING GAS, ADMIXING THE ORE THUS-TREATED WITH SAID PITCH, LIME AND SAID CARBON BLACK, FORMING THE MIXTURE THUS OBTAINED, CALCINING THE FORMED MIXTURE AND SUBJECTING THE FORMED, CALCINED MIXTURE TO SMELTING.
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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) | 1966-01-07 | 1966-07-09 | 1967-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-01-07 | 1970-07-09 | 1971-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-01-07 | 1974-07-09 | 1975-01-08 | $7700.00 | Window Closed / Lapsed |