US3159387A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rapid cycling heat treating furnace and method of operation
Assignee: Combustion Engineering Inc
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Filing: 1962-08-09
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Granted: 1964-12-01
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Expires: 1982-08-09
Abstract
No abstract record available.
Inventors
- 👤 Jr Josiah C Campbell
- 👤 Harry N Morgan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:04
CPC Classifications
C; C21; C21D; C21D9/00; C21D1/00; C21D1/74
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
122 words
A FURNACE IN WHICH ELEMENTS CAN BE HEAT TREATED, SAID FURNACE COMPRISING AN INNER, POROUS, UPRIGHT ENCLOSING WALL MEANS WITH A PLURALITY OF EVENLY SPACED LEVELS OF BURNERS MOUNTED THEREIN, EACH LEVEL OF BURNERS CONTAINING A PLURALITY OF BURNERS EVENLY SPACED AROUND THE PERIPHERY OF THE FURNACE, MEANS FOR SUPPLYING FUEL AND AIR TO THE BURNER, AN OUTER NON-POROUS WALL MEANS SPACED FROM AND SURROUNDING THE INNER WALL MEANS, DUCT MEANS FORMING AN AIR INLET AND OUTLET FOR THE SPACE BETWEEN THE INNER AND OUTER WALL MEANS, AIR SUPPLY MEANS CONNECTED TO SAID INLET, AND A DAMPER POSITIONED IN THE LINLET AND OUTLET, TO THEREBY ALLOW CONTROL OF THE AMOUNT OF AIR WHICH FLOWS THROUGH AND BY THE POROUS INNER WALL MEANS.
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) | 1967-12-01 | 1968-06-01 | 1968-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-12-01 | 1972-06-01 | 1972-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-12-01 | 1976-06-01 | 1976-12-01 | $7700.00 | Window Closed / Lapsed |