US3127264A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Non-ferrous recovery process
Assignee: —
•
Filing: —
•
Granted: 1964-03-31
•
Expires: 1981-03-31
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 23:40
CPC Classifications
C; C22; C22B; C22B3/00; C22B3/20; C22B3/44; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
59 words
A PROCESS OF TREATING AN AQUEOUS ALKALINE AMMONIACAL-AMMONIUM SALT SOLUTION CONTAINING A DISSOLVED VALUE OF AT LEAST ONE METAL SELECTED FROM THE CLASS CONSISTING OF LEAD AND TIN TO PRECIPITATE SAID METAL FROM SOLUTION WHICH COMPRISES: ADDING FINELY DIVIDED, WATER INSOLUBLE STRONTIUM SULFATE TO SAID SOLUTION AND AGITATING THE RESULTANT SLURRY WHEREBY SAID ONE METAL IS PRECIPITATED FROM SOLUTION.
Claim 2
Dependent Claim
59 words
A PROCESS OF TREATING AN AQUEOUS ALKALINE AMMONIACAL-AMMONIUM SALT SOLUTION CONTAINING A DISSOLVED VALUE OF AT LEAST ONE METAL SELECTED FROM THE CLASS CONSISTING OF LEAD AND TIN TO PRECIPITATE SAID METAL FROM SOLUTION WHICH COMPRISES: ADDING FINELY DIVIDED, WATER INSOLUBLE STRONTIUM SULFATE TO SAID SOLUTION AND AGITATING THE RESULTANT SLURRY WHEREBY SAID ONE METAL IS PRECIPITATED FROM SOLUTION.
References Cited (Backward Citations)
US2923618A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-03-31 | 1967-09-30 | 1968-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-03-31 | 1971-09-30 | 1972-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-03-31 | 1975-09-30 | 1976-03-31 | $7700.00 | Window Closed / Lapsed |