US2545239A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recovery of gold or silver
Assignee: Individual
•
Filing: 1946-08-10
•
Granted: 1951-03-13
•
Expires: 1966-08-10
Abstract
No abstract record available.
Inventors
- 👤 Jr Frank W Mcquiston
- 👤 Thomas G Chapman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:24
CPC Classifications
C; C01; C01G; C01G7/00; C01G7/003; C01G5/00; C01G5/003; C22; C22B; C22B3/00; C22B3/20; C22B3/22; C22B3/24; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
54 words
IN THE RECOVERY OF GOLD OR SILVER FROM A CYANIDE SOLUTION BY ADSORPTION ON ACTIVATED CARBON, THE IMPROVEMENT WHICH COMPRISES MECHANICALLY MOVING A MASS OF COARSE PARTICLES OF ACTIVATED CARBON WHILE CONFINED IN A PERFORATED MEMBER THROUGH THE SOLUTION AND SIMULTANEOUSLY AGITATING THE SOLUTION DURING ADSORPTION TO BRING IT INTO CONTRACT WITH THE CARBON.
Claim 2
Dependent Claim
54 words
IN THE RECOVERY OF GOLD OR SILVER FROM A CYANIDE SOLUTION BY ADSORPTION ON ACTIVATED CARBON, THE IMPROVEMENT WHICH COMPRISES MECHANICALLY MOVING A MASS OF COARSE PARTICLES OF ACTIVATED CARBON WHILE CONFINED IN A PERFORATED MEMBER THROUGH THE SOLUTION AND SIMULTANEOUSLY AGITATING THE SOLUTION DURING ADSORPTION TO BRING IT INTO CONTRACT WITH THE CARBON.
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) | 1954-03-12 | 1954-09-11 | 1955-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-03-12 | 1958-09-11 | 1959-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-03-12 | 1962-09-11 | 1963-03-13 | $7700.00 | Window Closed / Lapsed |