Patent US2853380A successfully refreshed from Google Patents.
US2853380A
Expired / Lapsed
US
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Method of recovering metal values from solutions
Assignee: Viridian Inc Canada
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Filing: 1957-05-20
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Granted: 1958-09-23
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Expires: 1977-05-20
Abstract
No abstract record available.
Inventors
- 👤 David J I Evans
- 👤 Peter Tao-I Chiang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:54
CPC Classifications
C; C22; C22B; C22B23/00; C22B23/04; C22B23/0453; C22B23/0461; C22B15/00; C22B15/0063; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
109 words
IN A METHOD OF PRODUCING SUBSTANTIALLY OXIDE-FREE, NON-FERROUS METAL POWDER OF A METAL HAVING AN OXIDATION-REDUCTION POTENTIAL BETWEEN CADMIUM AND SILVER INCLUSIVE, SAID METHOD INCLUDING THE STEP OF REACTING AN AQUEOUS SOLUTION WHICH CONTAINS A COMPOUND OF AT LEAST ONE OF SAD METALS WITH A REDUCING GAS AT ELEVATED TEMPERATURE AND PRESSURE, THE IMPROVEMENT WHICH COMPRISES PROVIDING IN SAID SOLUTION OF FINITE AMOUNT OF AN ADDITION AGENT OF THE GROUP CONSISTING OF ARCYLIC AND POLYACRYLIC ACID, POLYMERS, CO-POLYMER, DERIVATIVES AND SALTS OF ACRYLIC AND POLYACRYLIC ACIDS, COMPOUNDS WHICH CONTAIN ACRYLIC AND POLYACRYLIC ACIDS, AND POLYMERS CO-POLYMERS, DERIVATIVES AND SALTS OF ACRYLIC AND POLYACRYLIC ACIDS, LIGNIN AND DERIVATIVES OF LIGNIN.
Claim 2
Dependent Claim
109 words
IN A METHOD OF PRODUCING SUBSTANTIALLY OXIDE-FREE, NON-FERROUS METAL POWDER OF A METAL HAVING AN OXIDATION-REDUCTION POTENTIAL BETWEEN CADMIUM AND SILVER INCLUSIVE, SAID METHOD INCLUDING THE STEP OF REACTING AN AQUEOUS SOLUTION WHICH CONTAINS A COMPOUND OF AT LEAST ONE OF SAD METALS WITH A REDUCING GAS AT ELEVATED TEMPERATURE AND PRESSURE, THE IMPROVEMENT WHICH COMPRISES PROVIDING IN SAID SOLUTION OF FINITE AMOUNT OF AN ADDITION AGENT OF THE GROUP CONSISTING OF ARCYLIC AND POLYACRYLIC ACID, POLYMERS, CO-POLYMER, DERIVATIVES AND SALTS OF ACRYLIC AND POLYACRYLIC ACIDS, COMPOUNDS WHICH CONTAIN ACRYLIC AND POLYACRYLIC ACIDS, AND POLYMERS CO-POLYMERS, DERIVATIVES AND SALTS OF ACRYLIC AND POLYACRYLIC ACIDS, LIGNIN AND DERIVATIVES OF LIGNIN.
References Cited (Backward Citations)
US2740708A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-09-22 | 1962-03-24 | 1962-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-22 | 1966-03-24 | 1966-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-22 | 1970-03-24 | 1970-09-23 | $7700.00 | Window Closed / Lapsed |