Patent US3304171A successfully refreshed from Google Patents.
US3304171A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of controlling the operation of a blast furnace
Assignee: United States Steel Corp
•
Filing: 1963-06-26
•
Granted: 1967-02-14
•
Expires: 1983-06-26
Abstract
No abstract record available.
Inventors
- 👤 George H Mccleskey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:31
CPC Classifications
C; C21; C21B; C21B7/00; C21B7/24; C21B5/00; C21B5/006
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
99 words
THE METHOD OF CONTROLLING THE OPERATION OF A BLAST FURANCE WHICH COMPRISES DETERMINING THE OPTIMUM BLAST PRESSURE AND TOP GAS CONDITION FOR OPERATION OF THE FURNACE WITH A GIVEN BURDEN AND OPERATING PRACTICE, DETERMINING THE ACTUAL BLAST PRESSURE AND TOP GAS CONDITION AT INTERVALS, DECREASING THE WIND RATE AND INCREASING THE MOSITURE CONTENT OF SAID WIND WHEN THE DETERMINED BLAST PRESSURE IS HIGHER THAN THE SAID OPTIMUM, INCREASING THE WIND RATE AND DECREASING THE MOSITURE CONTENT OF SAID WIND WHEN THE DETERMINED BLAST PRESSURE IS LOWER THAN THE SAID OPTIMUM, DECREASING THE WIND RATE AND INCREASING THE MOISTURE CON-
References Cited (Backward Citations)
US2980416A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-02-13 | 1970-08-15 | 1971-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-13 | 1974-08-15 | 1975-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-13 | 1978-08-15 | 1979-02-14 | $7700.00 | Window Closed / Lapsed |