Patent US3158192A successfully refreshed from Google Patents.
US3158192A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Booster heater
Assignee: HEAT KING CORP
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Filing: 1963-02-07
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Granted: 1964-11-24
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Expires: 1983-02-07
Abstract
No abstract record available.
Inventors
- 👤 Donald E Mizer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:38
CPC Classifications
F; F02; F02N; F02N19/00; F02N19/02; F02N19/04; F02N19/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
158 words
IN A BOOSTER HEATER, THE COMBINATION WHICH COMPRISES A GENERALLY CYLINDRICAL SHEET METAL TUBE, MEANS WITHIN SAID TUBE DEFINING A SPIRAL PASSAGEWAY FOR COMBUSTION GASES, AND A BURNER ASSEMBLY FOR DIRECTING HOT GASES AXIALLY THROUGH SAID TUBE COMPRISING A FIRST SUBSTANTIALLY IMPERFORATE CYLINDRICAL CUP MOUNTED ON ONE END OF SAID TUBE AND COMMUNICATING WITH THE INTERIOR OF SAID TUBE, SAID TUBE HAVING AN AXIAL OUTLET OF DIAMETER LESS THAN THE DIAMETER OF THE TUBE AT THE END THEREOF OPPOSITE SAID FIRST CUP, THE INTERNAL DIAMETER OF SAID FIRST CUP BEING SUBSTANTIALLY THE SAME AS THE INTERNAL DIAMETER OF SAID TUBE, A SECOND CYLINDRICAL CUP POSITIONED WITHIN SAID FIRST CUP WITH THE WALLS THEREOF SPACED FROM THE WALLS OF SAID FIRST CUP AND THE INTERIOR THEREOF COMMUNICATING WITH THE INTERIOR OF SAID TUBE, SAID FIRST CUP HAVING A RADIAL AIR INLET THROUGH WHICH AIR MAY BE DIRECTED INTO THE SPACE BETWEEN THE BASES OF SAID FIRST AND SECOND CUPS,
Claim 2
Dependent Claim
158 words
IN A BOOSTER HEATER, THE COMBINATION WHICH COMPRISES A GENERALLY CYLINDRICAL SHEET METAL TUBE, MEANS WITHIN SAID TUBE DEFINING A SPIRAL PASSAGEWAY FOR COMBUSTION GASES, AND A BURNER ASSEMBLY FOR DIRECTING HOT GASES AXIALLY THROUGH SAID TUBE COMPRISING A FIRST SUBSTANTIALLY IMPERFORATE CYLINDRICAL CUP MOUNTED ON ONE END OF SAID TUBE AND COMMUNICATING WITH THE INTERIOR OF SAID TUBE, SAID TUBE HAVING AN AXIAL OUTLET OF DIAMETER LESS THAN THE DIAMETER OF THE TUBE AT THE END THEREOF OPPOSITE SAID FIRST CUP, THE INTERNAL DIAMETER OF SAID FIRST CUP BEING SUBSTANTIALLY THE SAME AS THE INTERNAL DIAMETER OF SAID TUBE, A SECOND CYLINDRICAL CUP POSITIONED WITHIN SAID FIRST CUP WITH THE WALLS THEREOF SPACED FROM THE WALLS OF SAID FIRST CUP AND THE INTERIOR THEREOF COMMUNICATING WITH THE INTERIOR OF SAID TUBE, SAID FIRST CUP HAVING A RADIAL AIR INLET THROUGH WHICH AIR MAY BE DIRECTED INTO THE SPACE BETWEEN THE BASES OF SAID FIRST AND SECOND CUPS,
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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) | 1967-11-24 | 1968-05-25 | 1968-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-11-24 | 1972-05-25 | 1972-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-11-24 | 1976-05-25 | 1976-11-24 | $7700.00 | Window Closed / Lapsed |