US2799571A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of utilizing blast-furnace flue-dust or the like
Assignee: United States Steel Corp
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Filing: 1954-09-10
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Granted: 1957-07-16
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Expires: 1974-09-10
Abstract
No abstract record available.
Inventors
- 👤 William W Justice
- 👤 Charles R Sands
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 06:17
CPC Classifications
C; C22; C22B; C22B1/00; C22B1/14; C22B1/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
80 words
A METHOD OF CONVERTING BLAST-FURNACE FLUYE-DUST INTO USABLE FORM, CONSISTING OF GRADUALLY CHURNING ABOUT 87 PARTS DUST AND ABOUT 5 PARTS HYDRAULIC CEMENT INTO ABOUT 7 PARTS WATER, ALL PROPORTIONS BY WEIGHT, CASTING THE RESUSTING MIX TO SLAB-FORMING TICKNESS ON AN EARTHY BED COVERED WITH FIBROUS SHEET MATERIAL, SCORING THE SLAB BEFORE THE MIX HAS FULLY SET, ALLOWING THE SLAB TO AGE AND BREAKING THE SLAB INTO BLOCKS ADAPTED FOR USE IN A METALLURGICAL FURNACE IN LIEU OF IRON ORE.
Claim 2
Independent Claim
80 words
A METHOD OF CONVERTING BLAST-FURNACE FLUYE-DUST INTO USABLE FORM, CONSISTING OF GRADUALLY CHURNING ABOUT 87 PARTS DUST AND ABOUT 5 PARTS HYDRAULIC CEMENT INTO ABOUT 7 PARTS WATER, ALL PROPORTIONS BY WEIGHT, CASTING THE RESUSTING MIX TO SLAB-FORMING TICKNESS ON AN EARTHY BED COVERED WITH FIBROUS SHEET MATERIAL, SCORING THE SLAB BEFORE THE MIX HAS FULLY SET, ALLOWING THE SLAB TO AGE AND BREAKING THE SLAB INTO BLOCKS ADAPTED FOR USE IN A METALLURGICAL FURNACE IN LIEU OF IRON ORE.
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) | 1960-07-15 | 1961-01-14 | 1961-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-07-15 | 1965-01-14 | 1965-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-07-15 | 1969-01-14 | 1969-07-16 | $7700.00 | Window Closed / Lapsed |