Patent US3231948A successfully refreshed from Google Patents.
US3231948A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for lining a hot top
Assignee: United States Steel Corp
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Filing: 1963-06-11
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Granted: 1966-02-01
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Expires: 1983-06-11
Abstract
No abstract record available.
Inventors
- 👤 Patrick E Dempsey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:07
CPC Classifications
B; B22; B22D; B22D7/00; B22D7/06; B22D7/10; B22D7/108
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
130 words
APPARATUS FOR LINING A GENERALLY VERTICAL OPENING IN A HOT TOP WITH A GRANULAR REFRACTORY COMPRISING A SUPPORT HAVING A GENERALLY VERTICAL HOLD THEREIN OF SUCH DIMENSIONS AS TO RECEIVE THE BOTTOM OF SAID HOT TOP, MEANS FOR SUPPORTING SAID HOT TOP ON SAID SUPPORT WITH THE BOTTOM THEREOF IN SAID HOLE, CLOSURE MEANS MOUNTED WITHIN SAID HOLE BELOW THE TOP THEREOF; MEANS FOR MOVING SAID CLOSURE MEANS FROM THE OPERATIVE POSITION WHERE THE HOLE IS CLOSED TO AN INOPERATIVE POSITION WHERE THE HOLE IS OPEN, MEANS FOR COOLING THE WALL OF SAID HOLE ABOVE SAID CLOSURE MEANS MEANS FOR SUBSTANTIALLY FILLING SAID OPENING WHEN THE SAID HOLE IS CLOSED WITH A GRANULAR REFRACTORY AND A BINDER THEREFOR, AND MEANS FOR REMOVING THE EXCESS REFRACTORY FROM SAID HOLE AND OPENING.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-01-31 | 1969-08-02 | 1970-02-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-31 | 1973-08-02 | 1974-02-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-31 | 1977-08-02 | 1978-02-01 | $7700.00 | Window Closed / Lapsed |