Patent US3314594A successfully refreshed from Google Patents.
US3029144A
Expired / Lapsed
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Recovery of mercury from brine containing mercury salts in solution
Assignee: Dow Chemical Co
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Filing: 1960-03-09
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Granted: 1962-04-10
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Expires: 1980-03-09
Abstract
No abstract record available.
Inventors
- 👤 Robert S Karpiuk
- 👤 John J Hoekstra
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 08:58
CPC Classifications
C; C22; C22B; C22B43/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
122 words
THE METHOD OF RECOVERING MERCURY FROM ANS AQUEOUS SOLUTION CONTAINING COMPOUNDS OF MERCURY DISSOLVED THEREIN CONSISTING OF PASSING SAID SOLUTION AT A TEMPERATURE OF BETWEEN 3* AND 100*C. AND CONCURRENTLY PASSING A LIQUID ALKALI AMALGAM, HAVING AN ALKALI METAL CONTENT NOT IN EXCESS OF THE SATURATION POINT THEREOF IN THE AMALGAM, AT LEAST ONCE THROUGH AT LEAST ONE BED WHICH COMPRISES AT LEAST 5 INCHES OF NON-METALLIC PIECES OF SUBSTANTIALLY INERT MATERIAL AT A FLOW RATE OF SAID AQUEOUS SOLUTION OF BETWEEN 10 AND 80 GALLONS AND SAID AMALGAM OF BETWEEN 17 AND 30 POUNDS PER SQUARE FOOT OF CROSS-SECTION OF SAID BED PER MINUTE TO REDUCE THE MERCURY COMPOUNDS IN SAID SOLUTION TO METALLIC MERCURY, AND RECOVERING THE MERCURY THUS REDUCED.
Claim 2
Independent Claim
122 words
THE METHOD OF RECOVERING MERCURY FROM ANS AQUEOUS SOLUTION CONTAINING COMPOUNDS OF MERCURY DISSOLVED THEREIN CONSISTING OF PASSING SAID SOLUTION AT A TEMPERATURE OF BETWEEN 3* AND 100*C. AND CONCURRENTLY PASSING A LIQUID ALKALI AMALGAM, HAVING AN ALKALI METAL CONTENT NOT IN EXCESS OF THE SATURATION POINT THEREOF IN THE AMALGAM, AT LEAST ONCE THROUGH AT LEAST ONE BED WHICH COMPRISES AT LEAST 5 INCHES OF NON-METALLIC PIECES OF SUBSTANTIALLY INERT MATERIAL AT A FLOW RATE OF SAID AQUEOUS SOLUTION OF BETWEEN 10 AND 80 GALLONS AND SAID AMALGAM OF BETWEEN 17 AND 30 POUNDS PER SQUARE FOOT OF CROSS-SECTION OF SAID BED PER MINUTE TO REDUCE THE MERCURY COMPOUNDS IN SAID SOLUTION TO METALLIC MERCURY, AND RECOVERING THE MERCURY THUS REDUCED.
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) | 1965-04-09 | 1965-10-09 | 1966-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-04-09 | 1969-10-09 | 1970-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-04-09 | 1973-10-09 | 1974-04-10 | $7700.00 | Window Closed / Lapsed |