US2870067A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for fluoride detection
Assignee: Southern Research Institute
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Filing: 1956-03-19
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Granted: 1959-01-20
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Expires: 1976-03-19
Abstract
No abstract record available.
Inventors
- 👤 Bertsil B Baker
- 👤 Joseph D Morrison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 01:52
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/26; G01N27/416; G01N27/49
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
82 words
A PROCESS FOR DETECTING FLUORIDE IONS IN AN ELECTROLYTIC SOLUTION WHICH COMPRISES INTRODUCING THE FLUORIDE INTO AN ELECTROLYTIC CELL HAVING AN ANODE OF ALUMINUM, AN ELECTROLYTE IN THE FORM OF A DILUTE ACID SOLUTION SUBSTANTIALLY FREE OF INTERFERING ANIONS AND A CATHODE OF A MATERIAL WHICH PRODUCES A POTENTIAL OF SUCH A SIGN AND MAGNITUDE IN THE ELECTROLYTE USED THAT ITS COMBINATION WITH THE ALUMINUM ANODE POTENTIAL RESULTS IN A CELL WHICH OPERATES SPONTANEOUSLY, AND MAINTAINING INSTANTANEOUS CURRENT READINGS OF SAID CELL.
Claim 2
Dependent Claim
82 words
A PROCESS FOR DETECTING FLUORIDE IONS IN AN ELECTROLYTIC SOLUTION WHICH COMPRISES INTRODUCING THE FLUORIDE INTO AN ELECTROLYTIC CELL HAVING AN ANODE OF ALUMINUM, AN ELECTROLYTE IN THE FORM OF A DILUTE ACID SOLUTION SUBSTANTIALLY FREE OF INTERFERING ANIONS AND A CATHODE OF A MATERIAL WHICH PRODUCES A POTENTIAL OF SUCH A SIGN AND MAGNITUDE IN THE ELECTROLYTE USED THAT ITS COMBINATION WITH THE ALUMINUM ANODE POTENTIAL RESULTS IN A CELL WHICH OPERATES SPONTANEOUSLY, AND MAINTAINING INSTANTANEOUS CURRENT READINGS OF SAID CELL.
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) | 1962-01-19 | 1962-07-21 | 1963-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-01-19 | 1966-07-21 | 1967-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-01-19 | 1970-07-21 | 1971-01-20 | $7700.00 | Window Closed / Lapsed |