US2773750A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Furnace
Assignee: Cleveland Trust Co
•
Filing: 1951-06-14
•
Granted: 1956-12-11
•
Expires: 1971-06-14
Abstract
No abstract record available.
Inventors
- 👤 Conant Leland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 00:14
CPC Classifications
B; B01; B01J; B01J3/00; B01J3/04; C; C22; C22B; C22B4/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
142 words
IN A FURNACE, THE COMBINATION OF A CLOSED CHAMBER STRUCTURE COMPRISING A CRUCIBLE WITH BOTTOM AND SIDE WALLS FORMED OF REFRACTORY MATERIAL OF GOOD THERMAL CONDUCTIVITY, A COVER CLOSING THE TOP OF THE CRUCIBLE, AND A SOLID CORE STRUCTURE OF CONSIDERABLE MASS FORMED OF REFRACTORY MATERIAL OF GOOD THERMAL CONDUCTIVITY AND SUPPORTED DIRECTLY ON THE BOTTOM WALL OF THE CRUIBLE WITH THE MAJOR PART OF ITS BOTTOM SURFACE IN GOOD HEAT-CONDUCTING ENGAGEMENT WITH THE MAJOR PART OF THE UPPER SURFACE OF THE BOTTOM WALL OF THE CRUCIBLE, THE CORE STRUCTURE EXTENDING UPWARD FROM THE CRUCIBLE BOTTOM WALL TO FORM FOR THE FURNACE AN ANNULAR CHARGE-TREATING SPACE BETWEEN THE CORE STRUCTURE AND THE SIDE WALL OF THE CRUCIBLE AND THE CHAMBER STRUCTURE HAVING IN THE UPPER PART THEREOF A CHARGING OPENING FOR DELIVERY OF SOLID MATERIAL INTO THE ANNULAR CHARGE-TREATING SPACE AND A
Claim 2
Dependent Claim
142 words
IN A FURNACE, THE COMBINATION OF A CLOSED CHAMBER STRUCTURE COMPRISING A CRUCIBLE WITH BOTTOM AND SIDE WALLS FORMED OF REFRACTORY MATERIAL OF GOOD THERMAL CONDUCTIVITY, A COVER CLOSING THE TOP OF THE CRUCIBLE, AND A SOLID CORE STRUCTURE OF CONSIDERABLE MASS FORMED OF REFRACTORY MATERIAL OF GOOD THERMAL CONDUCTIVITY AND SUPPORTED DIRECTLY ON THE BOTTOM WALL OF THE CRUIBLE WITH THE MAJOR PART OF ITS BOTTOM SURFACE IN GOOD HEAT-CONDUCTING ENGAGEMENT WITH THE MAJOR PART OF THE UPPER SURFACE OF THE BOTTOM WALL OF THE CRUCIBLE, THE CORE STRUCTURE EXTENDING UPWARD FROM THE CRUCIBLE BOTTOM WALL TO FORM FOR THE FURNACE AN ANNULAR CHARGE-TREATING SPACE BETWEEN THE CORE STRUCTURE AND THE SIDE WALL OF THE CRUCIBLE AND THE CHAMBER STRUCTURE HAVING IN THE UPPER PART THEREOF A CHARGING OPENING FOR DELIVERY OF SOLID MATERIAL INTO THE ANNULAR CHARGE-TREATING SPACE AND A
References Cited (Backward Citations)
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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) | 1959-12-11 | 1960-06-11 | 1960-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-12-11 | 1964-06-11 | 1964-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-12-11 | 1968-06-11 | 1968-12-11 | $7700.00 | Window Closed / Lapsed |