Patent US3617254A successfully refreshed from Google Patents.
US3617254A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making ore agglomerates
Assignee: Blocked Iron Corp
•
Filing: 1969-03-12
•
Granted: 1971-11-02
•
Expires: 1989-03-12
Abstract
Abstract A method is provided for producing lump metal ores by admixing the finely divided ore with an alkaline earth oxide or hydroxide and a carbonaceous material, forming the mixture into lumps and reacting it with carbon dioxide in the presence of moisture to form alkaline earth carbonates in situ in the lumps.
Inventors
- 👤 Louis George Imperato Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 08:14
CPC Classifications
C; C22; C22B; C22B1/00; C22B1/14; C22B1/24; C22B1/242
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
20 words
The method as claimed in claim 1 wherein the carbonaceous material is coal having a fineness of 4-mesh and under.
Claim 2
Dependent Claim
14 words
The method as claimed in claim 1 wherein the metal ore is copper concentrates.
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) | 1974-11-01 | 1975-05-03 | 1975-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-01 | 1979-05-03 | 1979-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-01 | 1983-05-03 | 1983-11-02 | $7700.00 | Window Closed / Lapsed |