US2936888A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of clarified acidic phosphatic solutions
Assignee: International Minerals and Chemical Corp
•
Filing: 1958-07-07
•
Granted: 1960-05-17
•
Expires: 1978-07-07
Abstract
No abstract record available.
Inventors
- 👤 William B Williams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 20:26
CPC Classifications
C; C01; C01B; C01B25/00; C01B25/16; C01B25/18; C01B25/234; C01B25/235
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
55 words
A PROCESS FOR PRODUCING A SUBSTANTIALLY CLARIFIED ACIDIC INORGANIC PHOSPHATIC SOLUTION WHICH COMPRISES RAPIDLY COOLING AND ACIDIC INORGANIC PHOSPHATIC SOLUTION CONTAINING SUSPENDED SOLID IMPURITIES FROM A TEMPERATURE ABOVE ABOUT 150*F. AT LEAST 20*F. IN LESS THAN ABOUT 24 HOURS, SUBJECTING THE COOLED SOLUTION TO CENTRIFUGAL SEPARATION TO SEPARATE THE SOLID IMPURITIES FROM THE ACIDIC IN-
Claim 2
Dependent Claim
55 words
A PROCESS FOR PRODUCING A SUBSTANTIALLY CLARIFIED ACIDIC INORGANIC PHOSPHATIC SOLUTION WHICH COMPRISES RAPIDLY COOLING AND ACIDIC INORGANIC PHOSPHATIC SOLUTION CONTAINING SUSPENDED SOLID IMPURITIES FROM A TEMPERATURE ABOVE ABOUT 150*F. AT LEAST 20*F. IN LESS THAN ABOUT 24 HOURS, SUBJECTING THE COOLED SOLUTION TO CENTRIFUGAL SEPARATION TO SEPARATE THE SOLID IMPURITIES FROM THE ACIDIC IN-
References Cited (Backward Citations)
US1665167A
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US1451786A
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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) | 1963-05-17 | 1963-11-16 | 1964-05-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-17 | 1967-11-16 | 1968-05-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-17 | 1971-11-16 | 1972-05-17 | $7700.00 | Window Closed / Lapsed |