US3214248A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Extracting silver salts from aqueous solution by organic solvents
Assignee: Hoechst AG
•
Filing: 1961-08-07
•
Granted: 1965-10-26
•
Expires: 1981-08-07
Abstract
No abstract record available.
Inventors
- 👤 Schwenk Ulrich
- 👤 Mau Gunter
- 👤 Schlafer Ludwig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:58
CPC Classifications
C; C01; C01G; C01G5/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
105 words
A PROCESS FOR REGENERATING AN AQUEOUS SOLUTION OF SILVER SALT SELECTED FROM THE GROUP CONSISTING OF SILVER FLUORIDE, SILVER FLUOSILICATE, SILVER FLUOBORATE AND SILVER TRIFLUORACETATE CONTAMINATED WITH OTHER DISSOLVED METAL SALTS WHICH COMPRSES EXTRACTING SILVER SALT FROM SAID SOLUTION BY ABSORPTION IN AN ORGANIC SOLVENT SELECTED FROM THE GROUP CONSISTING OF BENZENE, NAPHTHALENE, LOWER ALKYL SUBSTITUTED BENZENES, LOWER ALKYL SUBSTITUTED NAPHTHALENES AND LOWER ALKOXY LOWER ALKANES, SAID SOLVENT BEING SUBSTANTIALLY CHEMICALLY UNREACTIVE WITH SAID SILVER SALT AND INCAPABLE OF ABSORBING ANY SUBSTANTIAL AMOUNT OF SAID OTHER METAL SALT, REMOVING SAID ABSORBED SILVER SALT FROM SAID ORGANIC SOLVENT, AND REDISSOLVING SAID REMOVE SILVER SALT IN WATER.
Claim 2
Dependent Claim
105 words
A PROCESS FOR REGENERATING AN AQUEOUS SOLUTION OF SILVER SALT SELECTED FROM THE GROUP CONSISTING OF SILVER FLUORIDE, SILVER FLUOSILICATE, SILVER FLUOBORATE AND SILVER TRIFLUORACETATE CONTAMINATED WITH OTHER DISSOLVED METAL SALTS WHICH COMPRSES EXTRACTING SILVER SALT FROM SAID SOLUTION BY ABSORPTION IN AN ORGANIC SOLVENT SELECTED FROM THE GROUP CONSISTING OF BENZENE, NAPHTHALENE, LOWER ALKYL SUBSTITUTED BENZENES, LOWER ALKYL SUBSTITUTED NAPHTHALENES AND LOWER ALKOXY LOWER ALKANES, SAID SOLVENT BEING SUBSTANTIALLY CHEMICALLY UNREACTIVE WITH SAID SILVER SALT AND INCAPABLE OF ABSORBING ANY SUBSTANTIAL AMOUNT OF SAID OTHER METAL SALT, REMOVING SAID ABSORBED SILVER SALT FROM SAID ORGANIC SOLVENT, AND REDISSOLVING SAID REMOVE SILVER SALT IN WATER.
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) | 1968-10-25 | 1969-04-26 | 1969-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-25 | 1973-04-26 | 1973-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-25 | 1977-04-26 | 1977-10-26 | $7700.00 | Window Closed / Lapsed |