US2716591A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of resolving phosphatic complexes
Assignee: Individual
•
Filing: 1951-08-16
•
Granted: 1955-08-30
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Expires: 1971-08-16
Abstract
No abstract record available.
Inventors
- 👤 Alfred M Thomsen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:28
CPC Classifications
C; C05; C05B; C05B5/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
93 words
THE METHOD OF RESOLVING A BASIC IRON, MANGANESE AND PHOSPHORUS CONTAINING SLAG WHICH COMPRISES: REACTING SAID SLAG WITH AMMONIUM BISULPHATE UNTIL THE RESIDENT METALS SHALL HAVE BEEN SUBSTANTIALLY CONVERTED INTO SULPHATES WITH ATTENDANT FORMATION OF PHOSPHORIC ACID; FORMING A WATER SOLUTION OF SAID PHOSPHORIC ACID AND WATER SOLUBLE SULPHATES, AND SEPARATING THE SAME FROM THE SOLUBLE RESIDUE CONTAINING THE SUBSTANTIALLY INSOLUBLE SULPHATES; EVAPORATING AND CRYSTALLIZING SAID SOLUTION TO OBTAIN A MOTOR LIQUOR CONTAINING SUBSTANTIALLY ALL THE PHOSPHORIC ACID WITH BUT LITTLE SULPHATE AND A CRYSTAL PRODUCT CONSISTING ESSENTIALLY OF SULPHATES OF THE RESIDENT
Claim 2
Independent Claim
93 words
THE METHOD OF RESOLVING A BASIC IRON, MANGANESE AND PHOSPHORUS CONTAINING SLAG WHICH COMPRISES: REACTING SAID SLAG WITH AMMONIUM BISULPHATE UNTIL THE RESIDENT METALS SHALL HAVE BEEN SUBSTANTIALLY CONVERTED INTO SULPHATES WITH ATTENDANT FORMATION OF PHOSPHORIC ACID; FORMING A WATER SOLUTION OF SAID PHOSPHORIC ACID AND WATER SOLUBLE SULPHATES, AND SEPARATING THE SAME FROM THE SOLUBLE RESIDUE CONTAINING THE SUBSTANTIALLY INSOLUBLE SULPHATES; EVAPORATING AND CRYSTALLIZING SAID SOLUTION TO OBTAIN A MOTOR LIQUOR CONTAINING SUBSTANTIALLY ALL THE PHOSPHORIC ACID WITH BUT LITTLE SULPHATE AND A CRYSTAL PRODUCT CONSISTING ESSENTIALLY OF SULPHATES OF THE RESIDENT
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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) | 1958-08-29 | 1959-02-28 | 1959-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-08-29 | 1963-02-28 | 1963-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-08-29 | 1967-02-28 | 1967-08-30 | $7700.00 | Window Closed / Lapsed |