Patent US2844457A successfully refreshed from Google Patents.
US2844457A
Expired / Lapsed
US
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Lump ores and methods of producing them
Assignee: Blocked Iron Corp
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Filing: 1954-11-22
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Granted: 1958-07-22
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Expires: 1974-11-22
Abstract
No abstract record available.
Inventors
- 👤 Charles R Amberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:48
CPC Classifications
C; C22; C22B; C22B1/00; C22B1/14; C22B1/24; C22B1/2406
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
57 words
THE METHOD OF PRODUCING LUMP ORE FROM FINELY DIVIDED METAL-CONTAINING MATERIALS, COMPRISING THE STEPS OF ADMIXING THE FINELY DIVIDED MATERIAL WITH AT LEAST ONE OF THE GROUP CONSISTING OF THE OXIDES AND HYDROXIDES OF ALKALINE EARTH METALS AND REACTING THE RESULTING MIXTURE WITH CARBON DIOXIDE IN THE PRESENCE OF UP TO ABOUT 10% MOISTURE IN THE ADMIXTURE.
Claim 2
Independent Claim
57 words
THE METHOD OF PRODUCING LUMP ORE FROM FINELY DIVIDED METAL-CONTAINING MATERIALS, COMPRISING THE STEPS OF ADMIXING THE FINELY DIVIDED MATERIAL WITH AT LEAST ONE OF THE GROUP CONSISTING OF THE OXIDES AND HYDROXIDES OF ALKALINE EARTH METALS AND REACTING THE RESULTING MIXTURE WITH CARBON DIOXIDE IN THE PRESENCE OF UP TO ABOUT 10% MOISTURE IN THE ADMIXTURE.
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) | 1961-07-21 | 1962-01-20 | 1962-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-07-21 | 1966-01-20 | 1966-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-07-21 | 1970-01-20 | 1970-07-22 | $7700.00 | Window Closed / Lapsed |