US2686159A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Removal of entrained metallic mercury from alumina hydrosols
Assignee: Standard Oil Co
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Filing: 1950-11-29
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Granted: 1954-08-10
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Expires: 1970-11-29
Abstract
No abstract record available.
Inventors
- 👤 Glenn M Webb
- 👤 Heard Llewellyn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:02
CPC Classifications
C; C01; C01F; C01F7/00; C01F7/02; C01F7/42; C01F7/428
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
81 words
A PROCESS FOR PURIFYING AN ALUMINA HYDROSOL CONTAINING MERCURY DISPERSED THEREIN AS THE FREE, FINELY DIVIDED METAL, WHICH COMPRISES CONTACTING METALLIC ALUMINUM WITH AN AQUEOUS SOLUTION OF A SALT OF MERCURY, WHEREBY AN AMALGAM OF ALUMINUM IS FORMED ON THE SURFACE THEREOF, THEREAFTER PASSING SAID ALUMINA HYDROSOL THROUGH SAID AMALGAMATED ALUMINUM IN A TREATING ZONE, WHEREBY SAID FREE, FINELY DIVIDED MERCURY IS DEPOSITED ON THE AMALGAMATED SURFACES OF SAID ALUMINUM, AND WITHDRAWING A HYDROSOL HAVING A SUBSTANTIALLY DEPLETED CONTENT OF MERCURY.
Claim 2
Dependent Claim
81 words
A PROCESS FOR PURIFYING AN ALUMINA HYDROSOL CONTAINING MERCURY DISPERSED THEREIN AS THE FREE, FINELY DIVIDED METAL, WHICH COMPRISES CONTACTING METALLIC ALUMINUM WITH AN AQUEOUS SOLUTION OF A SALT OF MERCURY, WHEREBY AN AMALGAM OF ALUMINUM IS FORMED ON THE SURFACE THEREOF, THEREAFTER PASSING SAID ALUMINA HYDROSOL THROUGH SAID AMALGAMATED ALUMINUM IN A TREATING ZONE, WHEREBY SAID FREE, FINELY DIVIDED MERCURY IS DEPOSITED ON THE AMALGAMATED SURFACES OF SAID ALUMINUM, AND WITHDRAWING A HYDROSOL HAVING A SUBSTANTIALLY DEPLETED CONTENT OF MERCURY.
References Cited (Backward Citations)
US2449847A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-08-09 | 1958-02-08 | 1958-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-08-09 | 1962-02-08 | 1962-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-08-09 | 1966-02-08 | 1966-08-10 | $7700.00 | Window Closed / Lapsed |