Patent US3301544A successfully refreshed from Google Patents.
US3301544A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Blast furnace pulverized coal firing system
Assignee: Babcock and Wilcox Co
•
Filing: 1964-02-18
•
Granted: 1967-01-31
•
Expires: 1984-02-18
Abstract
No abstract record available.
Inventors
- 👤 Neil W Eft
- 👤 Robert E Zimmermann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:25
CPC Classifications
C; C21; C21B; C21B5/00; C21B5/001; C21B5/003
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
156 words
APPARATUS FOR SMELTING IRON ORE COMPRISING A PRESSURIZED BLAST FURNACE, A PULVERIZED FUEL PREPARATION SYSTEM OPERATING AT SUBSTANTIALLY ATMOSPHERIC PRESSURE AND INCLUDING A PULVERIZED FUEL COLLECTION BIN AND MEANS FOR FEEDING PULVERIZED FUEL THERETO, MEANS FOR WITHDRAWING FUEL FROM SAID BIN AT A CONTROLLED RATE, MEANS DEFINING A PRESSURIZING CHAMBER ARRANGED TO RECEIVE FUEL FROM SAID WITHDRAWING MEANS MEANS FOR DETECTING THE AMOUNT OF FUEL IN SAID BIN, MEANS RESPONSIVE TO THE AMOUNT OF FUEL IN SAID BIN AND BEING CONTROLLED BY SAID DETECTING MEANS FOR CONTROLLING THE OPERATION OF SAID WITHDRAWING MEANS TO THEREBY CONTROL THE RATE AT WHICH FUEL IS WITHDRAWN FROM SAID BIN, MEANS FOR PRESSURIZING THE FUEL IN SAID CHAMBER FOR INJECTION INTO SAID BLAST FURNACE, AND MEANS FOR REGULATING THE FLOW OF PULVERIZED FUEL TO SAID BIN IN RESPONSE TO A CONDITION OF SAID BLAST FURNACE TO THEREBY CONTROL THE RATE AT WHICH PULVERIZED FUEL IS FED TO SAID BLAST FURNACE.
Claim 2
Dependent Claim
156 words
APPARATUS FOR SMELTING IRON ORE COMPRISING A PRESSURIZED BLAST FURNACE, A PULVERIZED FUEL PREPARATION SYSTEM OPERATING AT SUBSTANTIALLY ATMOSPHERIC PRESSURE AND INCLUDING A PULVERIZED FUEL COLLECTION BIN AND MEANS FOR FEEDING PULVERIZED FUEL THERETO, MEANS FOR WITHDRAWING FUEL FROM SAID BIN AT A CONTROLLED RATE, MEANS DEFINING A PRESSURIZING CHAMBER ARRANGED TO RECEIVE FUEL FROM SAID WITHDRAWING MEANS MEANS FOR DETECTING THE AMOUNT OF FUEL IN SAID BIN, MEANS RESPONSIVE TO THE AMOUNT OF FUEL IN SAID BIN AND BEING CONTROLLED BY SAID DETECTING MEANS FOR CONTROLLING THE OPERATION OF SAID WITHDRAWING MEANS TO THEREBY CONTROL THE RATE AT WHICH FUEL IS WITHDRAWN FROM SAID BIN, MEANS FOR PRESSURIZING THE FUEL IN SAID CHAMBER FOR INJECTION INTO SAID BLAST FURNACE, AND MEANS FOR REGULATING THE FLOW OF PULVERIZED FUEL TO SAID BIN IN RESPONSE TO A CONDITION OF SAID BLAST FURNACE TO THEREBY CONTROL THE RATE AT WHICH PULVERIZED FUEL IS FED TO SAID BLAST FURNACE.
References Cited (Backward Citations)
US445390A
Cited
US3178164A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-01-30 | 1970-08-01 | 1971-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-30 | 1974-08-01 | 1975-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-30 | 1978-08-01 | 1979-01-31 | $7700.00 | Window Closed / Lapsed |