US3823012A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for feeding particulate materials to furnaces and the like
Assignee: Commonwealth Industrial Gases Ltd
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Filing: 1970-11-16
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Granted: 1974-07-09
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Expires: 1990-11-16
Abstract
Abstract A METHOD AND APPARATUS FOR FEEDING PARTICULATE MATERIAL TO A FURNACE USING A CONDUIT OR "LANCE" HAVING A NOZZEL FOR DELIVERY OF THE MATERIAL INTO THE FURNACE. THE CONDUIT HAS A FUEL SUPPLY DUCT AND AN OXYGEN SUPPLY DUCT DESIGNED SO THAT THE FUEL, OXYGEN AND PARTICULATES ARE UNIFORMLY MIXED AND HEATED BEFORE THEY REACH THE MELT TO INCREASE THE EFFICIENCY OF COMBUSTION.
Inventors
- 👤 E Johnstone
- 👤 R Brunton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 16:33
CPC Classifications
C; C21; C21C; C21C5/00; C21C5/28; C21C5/42; C21C5/46; C21C5/4606
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-07-08 | 1978-01-07 | 1978-07-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-08 | 1982-01-07 | 1982-07-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-08 | 1986-01-07 | 1986-07-09 | $7700.00 | Window Closed / Lapsed |