Patent US3228764A successfully refreshed from Google Patents.
US3228764A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid fuel control process for blast furnaces
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1960-06-27
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Granted: 1966-01-11
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Expires: 1980-06-27
Abstract
No abstract record available.
Inventors
- 👤 Erwin H Manny
- 👤 Walter F Rollman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 17:52
CPC Classifications
F; F23; F23N; F23N1/00; F23N1/02; C; C21; C21B; C21B5/00; C21B5/001
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
76 words
A PROCESS FOR CONTROLLING THE INJECTION OF FLUID FUEL AND HEATED BLAST AIR INTO A BLAST FURNACE, SAID PROCESS COMPRISING: INJECTING HEATED BLAST AIR INTO A BLAST FURNACE; INJECTING FLUID HYDROCARBON FUEL INTO ADMIXTURE WITH SAID BLAST AIR; MEASURING THE RATE AT WHICH SAID BLAST AIR IS FLOWING INTO SAID BLAST FURNACE; INCREASING AND DECREASING THE RATE OF FUEL INJECTION AS THE BLAST AIR FLOW RATE INCREASES AND DECREASES RESPECTIVELY, THEREBY MAINTAINING THE PRESELECTED FUEL/AIR RATIO.
Claim 2
Dependent Claim
76 words
A PROCESS FOR CONTROLLING THE INJECTION OF FLUID FUEL AND HEATED BLAST AIR INTO A BLAST FURNACE, SAID PROCESS COMPRISING: INJECTING HEATED BLAST AIR INTO A BLAST FURNACE; INJECTING FLUID HYDROCARBON FUEL INTO ADMIXTURE WITH SAID BLAST AIR; MEASURING THE RATE AT WHICH SAID BLAST AIR IS FLOWING INTO SAID BLAST FURNACE; INCREASING AND DECREASING THE RATE OF FUEL INJECTION AS THE BLAST AIR FLOW RATE INCREASES AND DECREASES RESPECTIVELY, THEREBY MAINTAINING THE PRESELECTED FUEL/AIR RATIO.
Claim 3
Dependent Claim
74 words
A PROCESS FOR CONTROLLING THE INJECTION OF FLUID FUEL INTO A FURNACE SO AS TO AVOID UPSETTING FURNACE OPERATION, SAID PROCESS COMPRISING: INJECTING HEATED BLAST AIR INTO A FURNACE; INJECTING A FLUID HYDROCARBON FUEL THROUGH A FUEL INJECTION CONDUIT INTO ADMIXTURE WITH SAID BLAST AIR; MEASUR ING THE BLAST AIR TEMPERATURE; TERMINATING SAID FUEL INJECTION WHEN THE TEMPERATURE OF THE BLAST AIR FALLS BELOW A PREDETERMINED TEMPERATURE; AND PURGING SAID INJECTION CONDUIT OF FUEL.
Claim 4
Dependent Claim
74 words
A PROCESS FOR CONTROLLING THE INJECTION OF FLUID FUEL INTO A FURNACE SO AS TO AVOID UPSETTING FURNACE OPERATION, SAID PROCESS COMPRISING: INJECTING HEATED BLAST AIR INTO A FURNACE; INJECTING A FLUID HYDROCARBON FUEL THROUGH A FUEL INJECTION CONDUIT INTO ADMIXTURE WITH SAID BLAST AIR; MEASUR ING THE BLAST AIR TEMPERATURE; TERMINATING SAID FUEL INJECTION WHEN THE TEMPERATURE OF THE BLAST AIR FALLS BELOW A PREDETERMINED TEMPERATURE; AND PURGING SAID INJECTION CONDUIT OF FUEL.
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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) | 1969-01-10 | 1969-07-12 | 1970-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-10 | 1973-07-12 | 1974-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-10 | 1977-07-12 | 1978-01-11 | $7700.00 | Window Closed / Lapsed |