Patent US2846912A successfully refreshed from Google Patents.
US2885282A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recovery of mercury
Assignee: Dow Chemical Co
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Filing: 1957-07-03
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Granted: 1959-05-05
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Expires: 1977-07-03
Abstract
No abstract record available.
Inventors
- 👤 Marshall P Neipert
- 👤 Charles K Bon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:31
CPC Classifications
C; C22; C22B; C22B43/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
85 words
A PROCESS FOR THE RECOVERY OF MERCURY FROM DECHLORINATED BRINE EFFLUENT FROM MERCURY CATHODE ELECTROLYTIC CELLS, WHICH COMPRISES INTERMIXING THE BRINE EFFLUENT CONTAINING THE MERCURY IN A REACTED FORM AS A SOLUBLE MERCURY COMPOUND WITH AN ALDEHYDE SELECTED FROM THE GROUP CONSISTING OF FORMALDEHYDE AND ACETALDEHYDE IN A PROPORTION OF FROM 0.01 TO 1 POUND MOLE OF THE ALDEHYDE PER THOUSAND GALLEONS OF THE BRINE AT A PH OF AT LEAST 7 TO REDUCE THE MERCURY COMPOUND TO METALLIC MERCURY, AND RECOVERING THE METTALIC MERCURY.
Claim 2
Dependent Claim
85 words
A PROCESS FOR THE RECOVERY OF MERCURY FROM DECHLORINATED BRINE EFFLUENT FROM MERCURY CATHODE ELECTROLYTIC CELLS, WHICH COMPRISES INTERMIXING THE BRINE EFFLUENT CONTAINING THE MERCURY IN A REACTED FORM AS A SOLUBLE MERCURY COMPOUND WITH AN ALDEHYDE SELECTED FROM THE GROUP CONSISTING OF FORMALDEHYDE AND ACETALDEHYDE IN A PROPORTION OF FROM 0.01 TO 1 POUND MOLE OF THE ALDEHYDE PER THOUSAND GALLEONS OF THE BRINE AT A PH OF AT LEAST 7 TO REDUCE THE MERCURY COMPOUND TO METALLIC MERCURY, AND RECOVERING THE METTALIC MERCURY.
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) | 1962-05-04 | 1962-11-03 | 1963-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-05-04 | 1966-11-03 | 1967-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-05-04 | 1970-11-03 | 1971-05-05 | $7700.00 | Window Closed / Lapsed |