US2772960A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Slag car for open hearth furnaces
Assignee: Armco Inc
•
Filing: 1955-08-11
•
Granted: 1956-12-04
•
Expires: 1975-08-11
Abstract
No abstract record available.
Inventors
- 👤 George H Todd
- 👤 Hugh C Barnes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:28
CPC Classifications
C; C21; C21B; C21B3/00; C21B3/04; C21B3/06; C21B3/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
48 words
THE METHOD OF HANDLING THE EFFERVESCENT SLAG RESULTING FROM THE FLUSHING OF AN OPEN HEARTH FURNACE, WHICH INCLUDES THE STEPS OF RECEIVING THE FLUSHED OFF SLAG ALTERNATELY IN TWO SLAG POTS, CHANGING FROM ONE SLAG POT TO THE OTHER BEFORE THE LEVEL OF THE EFFERESCENT SLAG IN SUCH
Claim 2
Independent Claim
48 words
THE METHOD OF HANDLING THE EFFERVESCENT SLAG RESULTING FROM THE FLUSHING OF AN OPEN HEARTH FURNACE, WHICH INCLUDES THE STEPS OF RECEIVING THE FLUSHED OFF SLAG ALTERNATELY IN TWO SLAG POTS, CHANGING FROM ONE SLAG POT TO THE OTHER BEFORE THE LEVEL OF THE EFFERESCENT SLAG IN SUCH
References Cited (Backward Citations)
US1812314A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-12-04 | 1960-06-04 | 1960-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-12-04 | 1964-06-04 | 1964-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-12-04 | 1968-06-04 | 1968-12-04 | $7700.00 | Window Closed / Lapsed |