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Patent US2866680A successfully refreshed from Google Patents.
US2866680A
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Alkyl pyrophosphate metal solvent extractants and process
Assignee: Individual
•
Filing: 1955-03-02
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Granted: 1958-12-30
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Expires: 1975-03-02
Abstract
No abstract record available.
Inventors
- 👤 Ray S Long
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 15:03
CPC Classifications
C; C22; C22B; C22B60/00; C22B60/02; C22B60/0204; C22B60/0217; C22B60/0221; C22B60/0226; C22B60/0252; C22B60/026
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
69 words
IN A PROCESS FOR RECOVERING URANIUM VALUES FROM A SOLUTION FORMED WITH A SOLVENT SELECTED FROM THE GROUP CONSISTING OF WATER AND PHOSPHORIC, NITRIC, HYDROCHLORIC, AND SULFURIC ACIDS, THE STEPS COMPRISING EXTRACTING SAID URANIUM FROM THE SOLUTION WITH AN EXTRACTANT PHASE COMPRISING A SYMMETRICAL DIALKYL PYROPHOSPHATE IN WHICH THE ALKYL SUBSTITUENTS HAVE A CHAIN LENGTH IN THE RANGE OF 4 TO 17 CARBONS ATOMS AND A ORGANIC DILUENT, AND
Claim 2
Dependent Claim
69 words
IN A PROCESS FOR RECOVERING URANIUM VALUES FROM A SOLUTION FORMED WITH A SOLVENT SELECTED FROM THE GROUP CONSISTING OF WATER AND PHOSPHORIC, NITRIC, HYDROCHLORIC, AND SULFURIC ACIDS, THE STEPS COMPRISING EXTRACTING SAID URANIUM FROM THE SOLUTION WITH AN EXTRACTANT PHASE COMPRISING A SYMMETRICAL DIALKYL PYROPHOSPHATE IN WHICH THE ALKYL SUBSTITUENTS HAVE A CHAIN LENGTH IN THE RANGE OF 4 TO 17 CARBONS ATOMS AND A ORGANIC DILUENT, AND
References Cited (Backward Citations)
US2119523A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-12-29 | 1962-06-30 | 1962-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-12-29 | 1966-06-30 | 1966-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-12-29 | 1970-06-30 | 1970-12-30 | $7700.00 | Window Closed / Lapsed |