Patent US3022155A successfully refreshed from Google Patents.
US3022155A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of superphosphates
Assignee: Chemical Construction Corp
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Filing: 1958-07-30
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Granted: 1962-02-20
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Expires: 1978-07-30
Abstract
No abstract record available.
Inventors
- 👤 Syers Roland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 21:15
CPC Classifications
C; C05; C05B; C05B1/00; C05B1/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
145 words
A PROCESS FOR THE PRODUCTION OF SUPER-PHOSPHATES WHICH COMPRISES INTIMATELY ADMIXING GROUND PHOSPHATE ROCK WITH A SULPHURIC ACID WASTE LIQUOR CONTAINING ABOUT 25* FREE SULFURIC ACID AND ABOUT 6% OF COMBINED IRON IN SOLUTION AS FERROUS SULFATE, WITHOUT THE APPLICATION OF HEAT, IN AN AMOUNT INSUFFICIENT TO REACT COMPLETELY WITH SAID PHOSPHATE ROCK, TO FORM A SEMI-SOLID SLURRY, ALLOWING THE MIXTURE TO STAND UNTIL A PARTIALLY DRIED CAKED PRODUCT IS FORMED, THEREAFTER BREAKING UP THE CAKED PRODUCT, DRYING AT ELEVATED TEMPERATURE, GRINDING THE DRIED PRODUCT, INTIMATELY ADMIXING THE DRIED GROUND PRODUCT WITH A SUFFICIENT FURTHER QUANTITY OF SULPHURIC ACID WASTE LIQUOR TO FORM A SEMI-SOLID SLURRY OF SULPHURIC STANTIALLY TO COMPLETE THE REACTION WITH THE UNREACTED PHOSPHATE ROCK, WITHOUT THE APPLICATION OF HEAT, THEREAFTER ALLOWING THE MIXTURE TO STAND AND BREAKING UP AND DRYING THE FINAL REACTION PRODUCT AND RECOVERING SAID FINAL SUPERPHOSPHATE REACTION PRODUCT.
Claim 2
Dependent Claim
145 words
A PROCESS FOR THE PRODUCTION OF SUPER-PHOSPHATES WHICH COMPRISES INTIMATELY ADMIXING GROUND PHOSPHATE ROCK WITH A SULPHURIC ACID WASTE LIQUOR CONTAINING ABOUT 25* FREE SULFURIC ACID AND ABOUT 6% OF COMBINED IRON IN SOLUTION AS FERROUS SULFATE, WITHOUT THE APPLICATION OF HEAT, IN AN AMOUNT INSUFFICIENT TO REACT COMPLETELY WITH SAID PHOSPHATE ROCK, TO FORM A SEMI-SOLID SLURRY, ALLOWING THE MIXTURE TO STAND UNTIL A PARTIALLY DRIED CAKED PRODUCT IS FORMED, THEREAFTER BREAKING UP THE CAKED PRODUCT, DRYING AT ELEVATED TEMPERATURE, GRINDING THE DRIED PRODUCT, INTIMATELY ADMIXING THE DRIED GROUND PRODUCT WITH A SUFFICIENT FURTHER QUANTITY OF SULPHURIC ACID WASTE LIQUOR TO FORM A SEMI-SOLID SLURRY OF SULPHURIC STANTIALLY TO COMPLETE THE REACTION WITH THE UNREACTED PHOSPHATE ROCK, WITHOUT THE APPLICATION OF HEAT, THEREAFTER ALLOWING THE MIXTURE TO STAND AND BREAKING UP AND DRYING THE FINAL REACTION PRODUCT AND RECOVERING SAID FINAL SUPERPHOSPHATE REACTION PRODUCT.
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) | 1965-02-19 | 1965-08-21 | 1966-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-02-19 | 1969-08-21 | 1970-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-02-19 | 1973-08-21 | 1974-02-20 | $7700.00 | Window Closed / Lapsed |