US2877165A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the electrolytic refining of lead
Assignee: Teck Metals Ltd
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Filing: 1957-04-03
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Granted: 1959-03-10
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Expires: 1977-04-03
Abstract
No abstract record available.
Inventors
- 👤 Turner Gordon Henry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 20:46
CPC Classifications
C; C25; C25C; C25C1/00; C25C1/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
67 words
IN THE ELECTROLYTIC REFINING OF LEAD BY THE ELECTRODEPOSITION OF LEAD FROM AN AQUEOUS LEAD FLOUSILICATEHYDROFLUOSILICIC ACID ELECTROLYTE, THE IMPROVEMENT WHICH COMPRISES THE ADDITION TO THE ELECTROLYTE OF THE WATER SOLUBLE EXTRACT OBTAINED BY HOT WATER LEACHING OF THE WOOD OF WESTERN RED CEDAR, THE EXTRACT BEING ADDED TO PROVIDE FROM 0.1 TO ABOUT 2 GRAMS OF EXTRACT, CALCULTED ON A DRY BASIS, PER LITRE OF ELECTROLYTE.
Claim 2
Dependent Claim
67 words
IN THE ELECTROLYTIC REFINING OF LEAD BY THE ELECTRODEPOSITION OF LEAD FROM AN AQUEOUS LEAD FLOUSILICATEHYDROFLUOSILICIC ACID ELECTROLYTE, THE IMPROVEMENT WHICH COMPRISES THE ADDITION TO THE ELECTROLYTE OF THE WATER SOLUBLE EXTRACT OBTAINED BY HOT WATER LEACHING OF THE WOOD OF WESTERN RED CEDAR, THE EXTRACT BEING ADDED TO PROVIDE FROM 0.1 TO ABOUT 2 GRAMS OF EXTRACT, CALCULTED ON A DRY BASIS, PER LITRE OF ELECTROLYTE.
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) | 1962-03-09 | 1962-09-08 | 1963-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-09 | 1966-09-08 | 1967-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-09 | 1970-09-08 | 1971-03-10 | $7700.00 | Window Closed / Lapsed |