US2820704A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of improving characteristics of iron oxide agglomerates
Assignee: United States Steel Corp
•
Filing: 1956-01-06
•
Granted: 1958-01-21
•
Expires: 1976-01-06
Abstract
No abstract record available.
Inventors
- 👤 Walter C Allen
- 👤 Thomas F Berry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:03
CPC Classifications
C; C22; C22B; C22B1/00; C22B1/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
31 words
A METHOD OF IMPROVING THE MECHANICAL STRENGTH OF PARTIALLY FUSED IRON OXIDE AGGIOMERATES FORMED AT ABOUT 2400 TO 2600*F COMPRISING COOLING THESE AGGLOMERATES FROM AN INITIAL TEMPERATURE APPROXIMATING THAT AT WHICH
Claim 2
Independent Claim
31 words
A METHOD OF IMPROVING THE MECHANICAL STRENGTH OF PARTIALLY FUSED IRON OXIDE AGGIOMERATES FORMED AT ABOUT 2400 TO 2600*F COMPRISING COOLING THESE AGGLOMERATES FROM AN INITIAL TEMPERATURE APPROXIMATING THAT AT WHICH
References Cited (Backward Citations)
US2533142A
Cited
US2511400A
Cited
GB623305A
Cited
US2608481A
Cited
US2676095A
Cited
US2595574A
Cited
US2758919A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-01-20 | 1961-07-22 | 1962-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-01-20 | 1965-07-22 | 1966-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-01-20 | 1969-07-22 | 1970-01-21 | $7700.00 | Window Closed / Lapsed |