US3056648A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for extracting cyanides
Assignee: EIDP Inc
•
Filing: 1960-08-26
•
Granted: 1962-10-02
•
Expires: 1980-08-26
Abstract
No abstract record available.
Inventors
- 👤 Childers Eugene
- 👤 West Norman Eugene
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:53
CPC Classifications
C; C07; C07C; C07C253/00; C07C253/32; C07C253/34; C01; C01C; C01C3/00; C01C3/08; C01C3/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
41 words
A PROCESS FOR RECOVERING COPPPER CATALYST SOLUTION FROM WASTE SOLUTIONS CONTAINING CUPROCYANIDE IONS AND HAVING A PH IN THE RANGE BETWEEN PH 4 AND PH 8 AND HAVING R VALUES OF 1 TO 3 WHERE R IS DEFINED BY THE EXPRESSION
Claim 2
Dependent Claim
41 words
A PROCESS FOR RECOVERING COPPPER CATALYST SOLUTION FROM WASTE SOLUTIONS CONTAINING CUPROCYANIDE IONS AND HAVING A PH IN THE RANGE BETWEEN PH 4 AND PH 8 AND HAVING R VALUES OF 1 TO 3 WHERE R IS DEFINED BY THE EXPRESSION
References Cited (Backward Citations)
US2877250A
Cited
US2955932A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-10-01 | 1966-04-02 | 1966-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-10-01 | 1970-04-02 | 1970-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-10-01 | 1974-04-02 | 1974-10-02 | $7700.00 | Window Closed / Lapsed |