US3785942A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the recovery of mercury from waste solids
Assignee: PPG Industries Inc
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Filing: 1972-03-08
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Granted: 1974-01-15
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Expires: 1992-03-08
Abstract
Abstract MERCURY IS RECOVERED FROM ELECTRLYTIC CELL CAUSTIC FILTER SOLIDS BY TREATMENT WITH A BRINE CONTAINING ELEMENTAL CHLORINE IN AN AMOUNT SUFFICIENT OT SOLUBILIZE THE MERCURY. THE MERCURY CONTAINING BRINE CAN THEN BE RETURNED TO THE ELECTROLYTIC CELL.
Inventors
- 👤 G Carlson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 12:16
CPC Classifications
C; C25; C25B; C25B1/00; C25B1/01; C25B1/34; C25B1/36; C22; C22B; C22B43/00; C25C; C25C7/00; C25C7/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-01-14 | 1977-07-16 | 1978-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-14 | 1981-07-16 | 1982-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-14 | 1985-07-16 | 1986-01-15 | $7700.00 | Window Closed / Lapsed |