Patent US2544119A successfully refreshed from Google Patents.
Patent US3039865A successfully refreshed from Google Patents.
US3039865A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recovery of mercury from aqueous solutions
Assignee: Dow Chemical Co
•
Filing: 1959-12-16
•
Granted: 1962-06-19
•
Expires: 1979-12-16
Abstract
No abstract record available.
Inventors
- 👤 Jeffrey F Gilbert
- 👤 Constantine N Rallis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:58
CPC Classifications
C; C22; C22B; C22B43/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
88 words
A PROCESS FOR RECOVERING MERCURY FROM SPENT AQUEOUS ELECTROLYTIC CELL BRINE CONTAINING FROM ABOUT 1 TO 500 PARTS PER MILLION OF DISSOLVED MERCURY AND HAVING A PH OF LESS THAN 5 COMPRISING ADDING A MATERIAL SELECTED FROM THE GROUP CONSISTING OF CAUSTIC SODA, SODIUM BICARBONATE AND SODIUM CARBONATE TO THE BRINE TO INCREASE THE PH VALUE TO THE RANGE OF 5 TO 11, BRINGING THE SO-ALKALIZED BRINE INTO INTIMATE CONTACT WITH A SUBSTANTIALLY WATERSTABLE SOLID REDUCTOR METAL, WHEREBY METALLIC MERCURY IS LIBERATED AND RECOVERING THE SO-LIBERATED METALLIC MERCURY.
Claim 2
Dependent Claim
88 words
A PROCESS FOR RECOVERING MERCURY FROM SPENT AQUEOUS ELECTROLYTIC CELL BRINE CONTAINING FROM ABOUT 1 TO 500 PARTS PER MILLION OF DISSOLVED MERCURY AND HAVING A PH OF LESS THAN 5 COMPRISING ADDING A MATERIAL SELECTED FROM THE GROUP CONSISTING OF CAUSTIC SODA, SODIUM BICARBONATE AND SODIUM CARBONATE TO THE BRINE TO INCREASE THE PH VALUE TO THE RANGE OF 5 TO 11, BRINGING THE SO-ALKALIZED BRINE INTO INTIMATE CONTACT WITH A SUBSTANTIALLY WATERSTABLE SOLID REDUCTOR METAL, WHEREBY METALLIC MERCURY IS LIBERATED AND RECOVERING THE SO-LIBERATED METALLIC MERCURY.
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) | 1965-06-18 | 1965-12-18 | 1966-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-06-18 | 1969-12-18 | 1970-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-06-18 | 1973-12-18 | 1974-06-19 | $7700.00 | Window Closed / Lapsed |