US3169054A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for use of fly dust from metallurgical furnaces
Assignee: GEA Group AG
•
Filing: 1961-12-06
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Granted: 1965-02-09
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Expires: 1981-12-06
Abstract
No abstract record available.
Inventors
- 👤 Werner Hermann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 08:40
CPC Classifications
F; F27; F27D; F27D17/00; F27D17/20; F27D17/22; C; C21; C21B; C21B13/00; C21B13/0046; C21C; C21C5/00; C21C5/28; C21C5/38; C22; C22B; C22B1/00; C22B1/14; C22B1/24; C22B1/2406; C22B1/242; C22B1/243; Y; Y02; Y02P; Y02P10/00; Y02P10/25
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
109 words
IN THE PROCESS OF RECYCLING DUST CONTAINING FROM 6 TO ABOUT 20% CALCIUM OXIDE PERCIPITATED FROM WASTE GASES BACK TO A METALLURGICAL FURNACE, THE IMPROVEMENT COMPRISING FORMING PELLETS OF THE DUST MIXED WITH FROM 8 TO 12% WATER, BLOWING GAS THROUGH A LAYER OF PELLETS TO DRY SAID PELLETS AT A GAS TEMPERATURE OF FROM ABOUT 15 TO 30*C. AND AT A SLIGHTLY GREATER THAN ATMOSPHERIC PRESSURE OF ABOUT 200 MM. TO REMOVE ABOUT FROM 1 TO 2% OF THE WATER WHEREBY THE REMAINING WATER IN SID PELLETS HARDENS SAID PELLETS WITH THE HEAT OF THE ALAKING REACTION AT A NON-BURSTING PELLET TEMPERATURE OF FROM ABOUT 40 TO 55*C.
Claim 2
Dependent Claim
109 words
IN THE PROCESS OF RECYCLING DUST CONTAINING FROM 6 TO ABOUT 20% CALCIUM OXIDE PERCIPITATED FROM WASTE GASES BACK TO A METALLURGICAL FURNACE, THE IMPROVEMENT COMPRISING FORMING PELLETS OF THE DUST MIXED WITH FROM 8 TO 12% WATER, BLOWING GAS THROUGH A LAYER OF PELLETS TO DRY SAID PELLETS AT A GAS TEMPERATURE OF FROM ABOUT 15 TO 30*C. AND AT A SLIGHTLY GREATER THAN ATMOSPHERIC PRESSURE OF ABOUT 200 MM. TO REMOVE ABOUT FROM 1 TO 2% OF THE WATER WHEREBY THE REMAINING WATER IN SID PELLETS HARDENS SAID PELLETS WITH THE HEAT OF THE ALAKING REACTION AT A NON-BURSTING PELLET TEMPERATURE OF FROM ABOUT 40 TO 55*C.
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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) | 1968-02-09 | 1968-08-10 | 1969-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-02-09 | 1972-08-10 | 1973-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-02-09 | 1976-08-10 | 1977-02-09 | $7700.00 | Window Closed / Lapsed |