Patent US3153429A successfully refreshed from Google Patents.
US3153429A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fire tube boiler
Assignee: CONTINENTAL BOILERS Inc
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Filing: 1962-01-12
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Granted: 1964-10-20
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Expires: 1982-01-12
Abstract
No abstract record available.
Inventors
- 👤 William W Palm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 08:59
CPC Classifications
F; F23; F23M; F23M9/00; F23M9/08; F22; F22B; F22B9/00; F22B9/10; F22B9/12; F22B9/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
140 words
IN A BOILER OF THE TYPE HAVING RETURN TUBES, THE COMBINATION WITH A RETURN TUBE OF A NOZZLE FORMED OF HIGHLY HEAT RESISTANT MATERIAL, SAID NOZZLE HAVING A BODY INSERTED WITHIN THE ENTRANCE END OF SAID RETURN TUBE ANDS AN ANNULAR FLANGE AT THE INLET END OF THE NOZZLE ENCLOSING THE ENTRANCE END OF THE RETURN TUBE TO LIMIT THE MOVEMENT OF THE NOZZLE INTO AND TO PROTECT THE END OF THE RETURN TUBE, THE BODY HAVING A BORE EXTENDING INWARDLY FROM THE INLET END OF THE NOZZLE, HAVING A PAIR OF HELICAL GROOVES EXTENDING ABOUT THE BODY AT THE DISCHARGE END OF THE NOZZLE, HAVING AN OPENING CONNECTING SAID BORE WITH EACH OF SAID GROOVES AND A CENTRAL WALL AT THE INNER END OF SAID BORE BETWEEN SAID OPENINGS TO DIRECT GASES PASSING THROUGH THE BORE TOWARDS SAID OPENINGS.
Claim 2
Dependent Claim
140 words
IN A BOILER OF THE TYPE HAVING RETURN TUBES, THE COMBINATION WITH A RETURN TUBE OF A NOZZLE FORMED OF HIGHLY HEAT RESISTANT MATERIAL, SAID NOZZLE HAVING A BODY INSERTED WITHIN THE ENTRANCE END OF SAID RETURN TUBE ANDS AN ANNULAR FLANGE AT THE INLET END OF THE NOZZLE ENCLOSING THE ENTRANCE END OF THE RETURN TUBE TO LIMIT THE MOVEMENT OF THE NOZZLE INTO AND TO PROTECT THE END OF THE RETURN TUBE, THE BODY HAVING A BORE EXTENDING INWARDLY FROM THE INLET END OF THE NOZZLE, HAVING A PAIR OF HELICAL GROOVES EXTENDING ABOUT THE BODY AT THE DISCHARGE END OF THE NOZZLE, HAVING AN OPENING CONNECTING SAID BORE WITH EACH OF SAID GROOVES AND A CENTRAL WALL AT THE INNER END OF SAID BORE BETWEEN SAID OPENINGS TO DIRECT GASES PASSING THROUGH THE BORE TOWARDS SAID OPENINGS.
References Cited (Backward Citations)
FR344359A
Cited
GB190518780A
Cited
US1184936A
Cited
CH81725A
Cited
US1469531A
Cited
GB222656A
Cited
US2016341A
Cited
US2347123A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-10-20 | 1968-04-20 | 1968-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-10-20 | 1972-04-20 | 1972-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-10-20 | 1976-04-20 | 1976-10-20 | $7700.00 | Window Closed / Lapsed |