Patent US3112920A successfully refreshed from Google Patents.
US3112920A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Open hearth furnace and method of constructing the same
Assignee: United States Steel Corp
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Filing: 1956-06-07
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Granted: 1963-12-03
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Expires: 1976-06-07
Abstract
No abstract record available.
Inventors
- 👤 Myron E Strate
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:40
CPC Classifications
F; F27; F27B; F27B3/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
74 words
THE METHOD OF CONSTRUCTING AN OPEN HEARTH FURNACE COMPRISING ERECTING ON A WHEELED VEHICLE A STEEL FRAMEWORK HAVING A SUPPORTING FRAME WITH TWO GROUPS OF COLUMNS SPACED APART LENGTHWISE OF THE FURNACE, LONGITUDINAL GENERALLY HORIZONTAL BEAMS EXTENDING BETWEEN AND FIXEDLY CONNECTING THE TOPS OF SAID COLUMNS, AND STRUCTURE FIXED TO AND EXTENDING UPWARDLY AND OUTWARDLY FROM BOTH OF SAID GROUPS OF COLUMNS, ERECTING CORRESPONDING STUB COLUMNS AT THE FURNACE SITE, CONNECTING A LIFTING TRUNNION
Claim 2
Independent Claim
74 words
THE METHOD OF CONSTRUCTING AN OPEN HEARTH FURNACE COMPRISING ERECTING ON A WHEELED VEHICLE A STEEL FRAMEWORK HAVING A SUPPORTING FRAME WITH TWO GROUPS OF COLUMNS SPACED APART LENGTHWISE OF THE FURNACE, LONGITUDINAL GENERALLY HORIZONTAL BEAMS EXTENDING BETWEEN AND FIXEDLY CONNECTING THE TOPS OF SAID COLUMNS, AND STRUCTURE FIXED TO AND EXTENDING UPWARDLY AND OUTWARDLY FROM BOTH OF SAID GROUPS OF COLUMNS, ERECTING CORRESPONDING STUB COLUMNS AT THE FURNACE SITE, CONNECTING A LIFTING TRUNNION
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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) | 1966-12-02 | 1967-06-03 | 1967-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-12-02 | 1971-06-03 | 1971-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-12-02 | 1975-06-03 | 1975-12-03 | $7700.00 | Window Closed / Lapsed |