US3228764A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid fuel control process for blast furnaces
Assignee: ExxonMobil Technology and Engineering Co
•
Filing: 1960-06-27
•
Granted: 1966-01-11
•
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
2026-10-31 15:30
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.
References Cited (Backward Citations)
US370251A
Cited
US502482A
Cited
US1482553A
Cited
GB261776A
Cited
US1620240A
Cited
US2072384A
Cited
US2388669A
Cited
US2420398A
Cited
US2690333A
Cited
US2916022A
Cited
US2719083A
Cited
FR1149952A
Cited
GB834043A
Cited
US2879056A
Cited
US3962094A
Cited
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 |