Patent US3305306A successfully refreshed from Google Patents.
US3305306A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of selectively recovering metal ions from solutions containing same
Assignee: Joh A Benckiser GmbH
•
Filing: 1963-04-02
•
Granted: 1967-02-21
•
Expires: 1983-04-02
Abstract
No abstract record available.
Inventors
- 👤 Morawe Hans-Georg
- 👤 Rueckert Helmut
- 👤 Furrer Ferdinand
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:02
CPC Classifications
D; D01; D01F; D01F13/00; D01F13/02; B; B01; B01J; B01J39/00; B01J39/04; B01J39/07; Y; Y02; Y02P; Y02P70/00; Y02P70/50; Y02P70/62
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
73 words
A PROCESS OF RECOVERING HEAVY METAL CATIONS FROM SOLUTIONS CONTAINING SUCH HEAVY METL CATIONS, SAID PROCESS COMPRISING THE STEPS (1) OF PASSING SUCH SOLUTIONS THROUGH A WEAKLY ACID CATION EXCHANGE RESIN IN ITS ALKALI METL FORM UNTIL THE HEAVY METAL ION CONCENTRATION IN THE EFFLUENT FROM THE CATION EXCHANGE RESIN INCREASES, AND (2) OF PASSING A DILUTE MINERAL ACID THERETHROUGH TO SELECTIVELY ELUTE THE ABSORBED HEAVY METAL IONS FROM THE CATION EXCHANGE RESIN.
Claim 2
Dependent Claim
73 words
A PROCESS OF RECOVERING HEAVY METAL CATIONS FROM SOLUTIONS CONTAINING SUCH HEAVY METL CATIONS, SAID PROCESS COMPRISING THE STEPS (1) OF PASSING SUCH SOLUTIONS THROUGH A WEAKLY ACID CATION EXCHANGE RESIN IN ITS ALKALI METL FORM UNTIL THE HEAVY METAL ION CONCENTRATION IN THE EFFLUENT FROM THE CATION EXCHANGE RESIN INCREASES, AND (2) OF PASSING A DILUTE MINERAL ACID THERETHROUGH TO SELECTIVELY ELUTE THE ABSORBED HEAVY METAL IONS FROM THE CATION EXCHANGE RESIN.
References Cited (Backward Citations)
US2628165A
Cited
US3216786A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-02-20 | 1970-08-22 | 1971-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-20 | 1974-08-22 | 1975-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-20 | 1978-08-22 | 1979-02-21 | $7700.00 | Window Closed / Lapsed |