US3215524A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metal recovery
Assignee: Nopco Chemical Co
•
Filing: 1963-02-20
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Granted: 1965-11-02
•
Expires: 1983-02-20
Abstract
No abstract record available.
Inventors
- 👤 Charles A Fetscher
- 👤 Stanley A Lipowski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:33
CPC Classifications
C; C22; C22B; C22B11/00; C22B11/08; C22B3/00; C22B3/20; C22B3/26; C22B3/306; C22B3/42; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
46 words
A PROCESS FOR RECOVERING METALS FROM CYANIDE COMPLEXES OF SAID METALS COMPRISING THE STEPS OF CONTACTING SAID COMPLEX IN AQUEOUS SOLUTION WITH AT LEAST ONE MATERIAL SELECTED FROM THE GROUP CONSISTING OF WATER-SOLUBLE ALDEHYDES AND COMPOSITIONS LIBERATING WATER-SOLUBLE ALDEHYDES AND THEREAFTER RECOVERING THE RESULTING LIBERATED METAL.
Claim 2
Dependent Claim
46 words
A PROCESS FOR RECOVERING METALS FROM CYANIDE COMPLEXES OF SAID METALS COMPRISING THE STEPS OF CONTACTING SAID COMPLEX IN AQUEOUS SOLUTION WITH AT LEAST ONE MATERIAL SELECTED FROM THE GROUP CONSISTING OF WATER-SOLUBLE ALDEHYDES AND COMPOSITIONS LIBERATING WATER-SOLUBLE ALDEHYDES AND THEREAFTER RECOVERING THE RESULTING LIBERATED METAL.
References Cited (Backward Citations)
US2371119A
Cited
US3088799A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-11-01 | 1969-05-03 | 1969-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-01 | 1973-05-03 | 1973-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-01 | 1977-05-03 | 1977-11-02 | $7700.00 | Window Closed / Lapsed |