Patent US2736187A successfully refreshed from Google Patents.
US2736187A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composite furnace block
Assignee: —
•
Filing: —
•
Granted: 1956-02-28
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Expires: 1973-02-28
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 01:47
CPC Classifications
B; B28; B28B; B28B23/00; B28B23/0018
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
57 words
A COMPOSITE FURNACE BLOCK COMPRISING A BASIC REFRACTORY BRICK, A PAIR OF STEEL CHANNELS HAVING WEBS VERY TIGHTLY ENGAGING TWO OPPOSITE SIDES OF THE BRICK AND HAVING SIDE FLANGES COVERING THE OTHER TWO SIDES OF THE BRICK, AND WELDS JOINING THE FLANGES AT EACH OF SAID LAST-MENTIONED SIDES TO FORM A METAL CASE TIGHTLY ENCLOSING THE BRICK.
Claim 2
Dependent Claim
57 words
A COMPOSITE FURNACE BLOCK COMPRISING A BASIC REFRACTORY BRICK, A PAIR OF STEEL CHANNELS HAVING WEBS VERY TIGHTLY ENGAGING TWO OPPOSITE SIDES OF THE BRICK AND HAVING SIDE FLANGES COVERING THE OTHER TWO SIDES OF THE BRICK, AND WELDS JOINING THE FLANGES AT EACH OF SAID LAST-MENTIONED SIDES TO FORM A METAL CASE TIGHTLY ENCLOSING THE BRICK.
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) | 1959-02-27 | 1959-08-29 | 1960-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-02-27 | 1963-08-29 | 1964-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-02-27 | 1967-08-29 | 1968-02-28 | $7700.00 | Window Closed / Lapsed |