US2919185A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of operating a gas generating shaft furnace as a gas generator, blast furnace or cupola, and a furnace for carrying the method into effect
Assignee: Individual
•
Filing: 1957-07-15
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Granted: 1959-12-29
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Expires: 1977-07-15
Abstract
No abstract record available.
Inventors
- 👤 Wahlberg Nils Rune
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 05:47
CPC Classifications
C; C21; C21B; C21B5/00; C21B5/008; C21B7/00; C21B7/002
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
149 words
A METHOD OF OPERATING A GAS GENERATING SHAFT FURNANCE AS A GAS GENERATOR, BLAST FURNACE OR CUPLA, ACCORDING TO WHICH A CHARGE WHICH CONTAINS A CARBONACEOUS AND TAR FORMING FUEL IS SUPPLIED AT THE UPPER PORTION OF THE FURNACE, AIR IS ADMITTER TO THE TOP OF THE FURNACE AND GAS FORMED IS DRAWN OFF ON A LEVEL BELOW SAID TOP OF THE FURNACE, CHARACTERIZED IN THAT HOT AIR IS ADMITTED TO THE TOP OF THE FURNACE AT AT LEAST TWO LEVELS, THE AIR INTRODUCED AT THE UPPER LEVEL BEING INTEODUCED IN THE FORM OF A PLURALITY OF STREAMS SPACED ABOUT THE CIRCUMFERENCE OF THE FURNACE AND DIRECTED OBLIQUELY DOWNWARDLY UPON A COLUM OF THE CHARGE AND THAT THE HAOT AIR IS ADMITTED TO THE TOP OF THE FURNACE IN SUCE A QUANTOTY THAT THE TAR CONSITUENTS OF THE FUEL ARE DISTILLED OFF AND GASIFIED WITHOUT THE SLAG CONSTISUENTS SINTERING.
Claim 2
Independent Claim
149 words
A METHOD OF OPERATING A GAS GENERATING SHAFT FURNANCE AS A GAS GENERATOR, BLAST FURNACE OR CUPLA, ACCORDING TO WHICH A CHARGE WHICH CONTAINS A CARBONACEOUS AND TAR FORMING FUEL IS SUPPLIED AT THE UPPER PORTION OF THE FURNACE, AIR IS ADMITTER TO THE TOP OF THE FURNACE AND GAS FORMED IS DRAWN OFF ON A LEVEL BELOW SAID TOP OF THE FURNACE, CHARACTERIZED IN THAT HOT AIR IS ADMITTED TO THE TOP OF THE FURNACE AT AT LEAST TWO LEVELS, THE AIR INTRODUCED AT THE UPPER LEVEL BEING INTEODUCED IN THE FORM OF A PLURALITY OF STREAMS SPACED ABOUT THE CIRCUMFERENCE OF THE FURNACE AND DIRECTED OBLIQUELY DOWNWARDLY UPON A COLUM OF THE CHARGE AND THAT THE HAOT AIR IS ADMITTED TO THE TOP OF THE FURNACE IN SUCE A QUANTOTY THAT THE TAR CONSITUENTS OF THE FUEL ARE DISTILLED OFF AND GASIFIED WITHOUT THE SLAG CONSTISUENTS SINTERING.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-12-28 | 1963-06-29 | 1963-12-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-12-28 | 1967-06-29 | 1967-12-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-12-28 | 1971-06-29 | 1971-12-29 | $7700.00 | Window Closed / Lapsed |