US3360592A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preparing fibers from by-product slag of a phosphorus furnace
Assignee: FMC Corp
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Filing: 1965-08-23
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Granted: 1967-12-26
•
Expires: 1985-08-23
Abstract
No abstract record available.
Inventors
- 👤 Rau Eric
- 👤 Jr William H Kibbel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:48
CPC Classifications
C; C01; C01B; C01B25/00; C01B25/003; C01B25/01; C01B25/02; C03; C03B; C03B37/00; C03B37/01; C03B37/04; C03B37/05; C03C; C03C13/00; C03C13/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
160 words
THE METHOD OF PRODUCING MINERAL FIBERS WHILE PRODUCING ELEMENTAL PHOSPHORUS AND FERROPHOS FROM PHOSPHORUS-CONTAINING SHALE COMPOSED GENERALLY OF 22 TO 26% P2O5, 29 TO 43% CAO, 10 TO 30% SIO2, AND THE BALANCE MINOR CONSTITUENTS INCLUDING 3 TO 10% AL2O3, 0.5 TO 2% FE2O3 AND MOISTURE, AN SIO2 SOURCE AND COKE, COMPRISING FEEDING TO AN ELECTRIC ARC FURNACE A CHARGE COMPOSED OF SAID SHALE, SAID SIO2 SOURCE AND SAID COKE IN RELATIVE AMOUNTS TO PROVIDE A WEIGHT RATIO OF SIO2 TO CAO OF 0.75 TO 1.05 PARTS OF SIO2:1 PART OF CAO, AND 1 TO 1.1 PARTS OF COKE PER PART OF P2O5 AND TRANSITION METALS CALCULATED AS THEIR OXIDES, ELECTRICALLY HEATING SAID CHARGE IN SAID ELECTRIC ARE FURNACE TO 1350* TO 1600*C. TO PROVIDE A MOLTEN FURNACE BURDEN AND PHOSPHORUS AND CARBON MONOXIDE VAPORS, REMOVING SAID PHOSPHORUS AND CARBON MONOXIDE FROM SAID FURNACE, SEPARATELY RECOVERING FERROPHOS AND A MOLTEN SLAG AT A TEMPERATURE OF AT LEAST 2500*F. FROM FUR-
Claim 2
Independent Claim
160 words
THE METHOD OF PRODUCING MINERAL FIBERS WHILE PRODUCING ELEMENTAL PHOSPHORUS AND FERROPHOS FROM PHOSPHORUS-CONTAINING SHALE COMPOSED GENERALLY OF 22 TO 26% P2O5, 29 TO 43% CAO, 10 TO 30% SIO2, AND THE BALANCE MINOR CONSTITUENTS INCLUDING 3 TO 10% AL2O3, 0.5 TO 2% FE2O3 AND MOISTURE, AN SIO2 SOURCE AND COKE, COMPRISING FEEDING TO AN ELECTRIC ARC FURNACE A CHARGE COMPOSED OF SAID SHALE, SAID SIO2 SOURCE AND SAID COKE IN RELATIVE AMOUNTS TO PROVIDE A WEIGHT RATIO OF SIO2 TO CAO OF 0.75 TO 1.05 PARTS OF SIO2:1 PART OF CAO, AND 1 TO 1.1 PARTS OF COKE PER PART OF P2O5 AND TRANSITION METALS CALCULATED AS THEIR OXIDES, ELECTRICALLY HEATING SAID CHARGE IN SAID ELECTRIC ARE FURNACE TO 1350* TO 1600*C. TO PROVIDE A MOLTEN FURNACE BURDEN AND PHOSPHORUS AND CARBON MONOXIDE VAPORS, REMOVING SAID PHOSPHORUS AND CARBON MONOXIDE FROM SAID FURNACE, SEPARATELY RECOVERING FERROPHOS AND A MOLTEN SLAG AT A TEMPERATURE OF AT LEAST 2500*F. FROM FUR-
References Cited (Backward Citations)
US2793395A
Cited
US3097085A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-12-25 | 1971-06-26 | 1971-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-12-25 | 1975-06-26 | 1975-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-12-25 | 1979-06-26 | 1979-12-26 | $7700.00 | Window Closed / Lapsed |