US3799853A
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US
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Method for reducing the organo lead compound content of aqueous solutions by electrolysis in an electrolyte permeable metallic cathode electrolytic cell
Assignee: PPG Industries Inc
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Filing: 1972-12-19
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Granted: 1974-03-26
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Expires: 1992-12-19
Abstract
Abstract A METHOD AND APPARATUS FOR REDUCING THE LEAD CONTENT OF DILUTE AQUEOUS SOLUTIONS IS DISCLOSED. THE LEAD IS PRESENT AS ORGANO-LEAD COMPOUNDS FROM THE MANUFACTURE OF AUTOMOTIVE ANTI-KNOCK COMPOUNDS MOST FREQUENTLY AS TRIETHYL LEAD CHLORIDE. THE ORGANO-LEAD COMPOUND-CONTAINING SOLUTION IS PASSED THROUGH AN ELECTROLYTIC CELL HAVING AN ELEC- TROLYTE PERMEABLE CATHODE FABRICATED FROM A METAL HAVING HYDROGEN OVER VOLTAGE IN EXCESS OF 1.6 VOLTS. THE LEAD IS DEPOSITED ON THE CATHODE.
Inventors
- 👤 W Carlin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:53
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/46; C02F1/461; C02F1/46104; C02F1/46109; C02F1/46114; C02F1/467; C02F1/4676; C02F1/4678; C02F2101/00; C02F2101/10; C02F2101/20; C02F2201/00; C02F2201/46; C02F2201/461; C02F2201/46105; C02F2201/4611
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References Cited (Backward Citations)
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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) | 1977-03-25 | 1977-09-24 | 1978-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-25 | 1981-09-24 | 1982-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-25 | 1985-09-24 | 1986-03-26 | $7700.00 | Window Closed / Lapsed |