US3241823A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air-heater cupola constructions
Assignee: Licencia Talalmanyokat Ertekesito Vallalat
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Filing: 1963-12-11
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Granted: 1966-03-22
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Expires: 1983-12-11
Abstract
No abstract record available.
Inventors
- 👤 Pentek Istvan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 11:03
CPC Classifications
C; C21; C21B; C21B9/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
115 words
A FURNACE CONSTRUCTION FOR AN AIR HEATER FOR BURNING QUALITY FUELS, SAID AIR HEATER HAVING A FURNACE SHAFT AND A HEAT EXCHANGE FRID SHAFT AND MEANS SEPARATING SAID SHAFTS FROM EACH OTHER, COMPRISING AN INNER TOP WALLL CLOSING AND CONNECTING UPPER ENDS OF SAID SHAFTS AND FORMING A COMBUSTION CHAMBER DISPOSED AT LEAST PRINCIPALLY ABOVE SAID SHAFTS, AN OUTER TOP WALL SPACED FROM THE INNER TOP WALL TO PROVIDE AN INTERMEDIATE CHAMBER, SAID OUTER TOP WALL HAVING AIR SUPPLY PASSAGES COMMUNICATING WITH SAID INTERMEDIATE CHAMBER FOR SUPPLYING AIR THERETO, AND SAID INNER TOP WALL HAVING A PLURALITY OF DOWNWARDLY EXTENDING PASSAGES THEREIN FOR THE FLOW OF AIR FROM THE INTERMEDIATE CHAMBER TO THE COMBUSTION CHAMBER.
Claim 2
Dependent Claim
115 words
A FURNACE CONSTRUCTION FOR AN AIR HEATER FOR BURNING QUALITY FUELS, SAID AIR HEATER HAVING A FURNACE SHAFT AND A HEAT EXCHANGE FRID SHAFT AND MEANS SEPARATING SAID SHAFTS FROM EACH OTHER, COMPRISING AN INNER TOP WALLL CLOSING AND CONNECTING UPPER ENDS OF SAID SHAFTS AND FORMING A COMBUSTION CHAMBER DISPOSED AT LEAST PRINCIPALLY ABOVE SAID SHAFTS, AN OUTER TOP WALL SPACED FROM THE INNER TOP WALL TO PROVIDE AN INTERMEDIATE CHAMBER, SAID OUTER TOP WALL HAVING AIR SUPPLY PASSAGES COMMUNICATING WITH SAID INTERMEDIATE CHAMBER FOR SUPPLYING AIR THERETO, AND SAID INNER TOP WALL HAVING A PLURALITY OF DOWNWARDLY EXTENDING PASSAGES THEREIN FOR THE FLOW OF AIR FROM THE INTERMEDIATE CHAMBER TO THE COMBUSTION CHAMBER.
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) | 1969-03-21 | 1969-09-20 | 1970-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-21 | 1973-09-20 | 1974-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-21 | 1977-09-20 | 1978-03-22 | $7700.00 | Window Closed / Lapsed |