US2806776A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of strengthening iron ore agglomerates
Assignee: Illinois Clay Products Co
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Filing: 1954-09-16
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Granted: 1957-09-17
•
Expires: 1974-09-16
Abstract
No abstract record available.
Inventors
- 👤 John H Veale
- 👤 Howard F West
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:11
CPC Classifications
C; C22; C22B; C22B1/00; C22B1/14; C22B1/24; C22B1/2406
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
74 words
THE METHOD OF SURFACE STRENGTHENING TACONITE NODULES HAVING SUBSTANTIAL QUANTITIES OF IRON OXIDE IN THEIR SURFACES WHICH COMPRISES THE STEP OF RAISING THE TEMPERATURE OF THE SURFACES OF THE NODUULES TO A TEMPERA2300* F., AND OF CONTACTING UNDER OXIDIZING CONDITIONS SMALL PARTICLES COMPOUND ESSENTIALLY OF A MATERIAL SELECTED FROM THE GROUP CONSISTING OF CALCIUM CXIDE AND CALCIUMMAGNESIUM OXIDE WITH THE SURFACES OF THE NODULES TO REACT WITH THE IRON OXIDE TO FROM FERRITE BONDS.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-09-16 | 1961-03-18 | 1961-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-16 | 1965-03-18 | 1965-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-16 | 1969-03-18 | 1969-09-17 | $7700.00 | Window Closed / Lapsed |