US2827410A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrolytic refining of lead
Assignee: United States Smelting Refining and Mining Co
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Filing: 1957-05-13
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Granted: 1958-03-18
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Expires: 1977-05-13
Abstract
No abstract record available.
Inventors
- 👤 Frank C Smyers
- 👤 Grover B Lantz
- 👤 Frank C Mathers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 21:15
CPC Classifications
C; C25; C25C; C25C1/00; C25C1/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
62 words
IN THE ELECTROLYTIC PROCESS OF DEPOSITING LEAD IN AN AQUEOUS ELECTROLYTE CONTAINING LEAD FLUOSILICATE, THE STEP WHICH COMPRISES THE ADDITION TO THE ELECTROLYTE FOR EACH TON OF LEAD DEPOSITED OF FROM 0.1 TO 5.0 POUNDS OF GOULAC AND FROM 3.0 TO 0.1 POUND OF MATERIAL SELECTED FROM THE GROUP CONSISTING OF WATER-SOLUBLE PORTIONS OF CHESTNUT EXTRACT AND ELECTORLYTE-SOLUBLE PORTIONS OF CHESTNUT EXTRACT.
Claim 2
Dependent Claim
62 words
IN THE ELECTROLYTIC PROCESS OF DEPOSITING LEAD IN AN AQUEOUS ELECTROLYTE CONTAINING LEAD FLUOSILICATE, THE STEP WHICH COMPRISES THE ADDITION TO THE ELECTROLYTE FOR EACH TON OF LEAD DEPOSITED OF FROM 0.1 TO 5.0 POUNDS OF GOULAC AND FROM 3.0 TO 0.1 POUND OF MATERIAL SELECTED FROM THE GROUP CONSISTING OF WATER-SOLUBLE PORTIONS OF CHESTNUT EXTRACT AND ELECTORLYTE-SOLUBLE PORTIONS OF CHESTNUT EXTRACT.
References Cited (Backward Citations)
US2664393A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-03-17 | 1961-09-16 | 1962-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-03-17 | 1965-09-16 | 1966-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-03-17 | 1969-09-16 | 1970-03-18 | $7700.00 | Window Closed / Lapsed |