US2556542A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Defluorination of phosphate rock
Assignee: Coronet Phosphate Co
•
Filing: 1950-11-28
•
Granted: 1951-06-12
•
Expires: 1970-11-28
Abstract
No abstract record available.
Inventors
- 👤 Clinton A Hollingsworth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:15
CPC Classifications
C; C05; C05B; C05B13/00; C05B13/02; Y; Y10; Y10S; Y10S71/00; Y10S71/03
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
96 words
IN THE METHOD OF DEFLUORINATING PHOSPHATE ROCK BY CALCINATION IN A KILN HAVING A FUEL BURNER AT THE HOT END THEREOF AND THROUGH WHICH THE CALCINING CHARGE PROGRESSIVELY PASSES FROM THE OTHER END OF THE KILN TO SAID HOT END AT PROGRESSIVELY INCREASING TEMPERATURES AND IN WHICH THE FUSION TEMPERATURE OF THE CHARGE IS RAISED NEAR THE HOT END OF THE KILN BY BLOWING FINELY DIVIDED LIME INTO THE HOT END OF THE KILN, THE IMPROVEMENT WHICH COMPRISES BLOWING THE FINELY DIVIDED LIME INTO THE KILN AT A POINT BETWEEN THE FUEL BURNER AND THE CHARGE.
Claim 2
Dependent Claim
96 words
IN THE METHOD OF DEFLUORINATING PHOSPHATE ROCK BY CALCINATION IN A KILN HAVING A FUEL BURNER AT THE HOT END THEREOF AND THROUGH WHICH THE CALCINING CHARGE PROGRESSIVELY PASSES FROM THE OTHER END OF THE KILN TO SAID HOT END AT PROGRESSIVELY INCREASING TEMPERATURES AND IN WHICH THE FUSION TEMPERATURE OF THE CHARGE IS RAISED NEAR THE HOT END OF THE KILN BY BLOWING FINELY DIVIDED LIME INTO THE HOT END OF THE KILN, THE IMPROVEMENT WHICH COMPRISES BLOWING THE FINELY DIVIDED LIME INTO THE KILN AT A POINT BETWEEN THE FUEL BURNER AND THE CHARGE.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-06-11 | 1954-12-11 | 1955-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-06-11 | 1958-12-11 | 1959-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-06-11 | 1962-12-11 | 1963-06-12 | $7700.00 | Window Closed / Lapsed |