Patent US3005701A successfully refreshed from Google Patents.
US3005701A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making melting stock by direct reduction
Assignee: Bethlehem Steel Corp
•
Filing: 1957-10-15
•
Granted: 1961-10-24
•
Expires: 1977-10-15
Abstract
No abstract record available.
Inventors
- 👤 John E Eberhardt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:35
CPC Classifications
C; C21; C21B; C21B13/00; C21B13/0086; Y; Y02; Y02P; Y02P10/00; Y02P10/10; Y02P10/134
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
72 words
IN A PROCESS FOR PRODUCING NON-PYROPHORIC METALLIC IRON COMPACTS SUITABLE FOR MELTING IN AN OPEN HEARTH OR ELECTRIC FURNACE, THE SUCCESSIVE STEPS OF REDUCING IRON ORE TO METALLIC IRON POWDER AT A TEMPERATURE BETWEEN 700-1100*F., COMPACTING SAID METALLIC IRON POWDER, HEATING SAID COMPACTS TO A TEMPERATURE OF 1450-2200* F. TO RENDER THE COMPACTS NON-PYROPHORIC AND COOLING SAID COMPACTS TO APPROXIMATELY ROOM TEMPERATURE, ALL OF SAID STEPS BEING CARRIED OUT IN NON-OXIDIZING ATMOSPHERE.
Claim 2
Dependent Claim
72 words
IN A PROCESS FOR PRODUCING NON-PYROPHORIC METALLIC IRON COMPACTS SUITABLE FOR MELTING IN AN OPEN HEARTH OR ELECTRIC FURNACE, THE SUCCESSIVE STEPS OF REDUCING IRON ORE TO METALLIC IRON POWDER AT A TEMPERATURE BETWEEN 700-1100*F., COMPACTING SAID METALLIC IRON POWDER, HEATING SAID COMPACTS TO A TEMPERATURE OF 1450-2200* F. TO RENDER THE COMPACTS NON-PYROPHORIC AND COOLING SAID COMPACTS TO APPROXIMATELY ROOM TEMPERATURE, ALL OF SAID STEPS BEING CARRIED OUT IN NON-OXIDIZING ATMOSPHERE.
References Cited (Backward Citations)
US1453057A
Cited
US2252697A
Cited
US2382601A
Cited
US2287663A
Cited
GB590392A
Cited
US2766108A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-10-23 | 1965-04-24 | 1965-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-10-23 | 1969-04-24 | 1969-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-10-23 | 1973-04-24 | 1973-10-24 | $7700.00 | Window Closed / Lapsed |