US3174474A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radiant heating units
Assignee: Hazen Engineering Co
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Filing: 1963-10-04
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Granted: 1965-03-23
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Expires: 1983-10-04
Abstract
No abstract record available.
Inventors
- 👤 Robert L Jones
- 👤 Howard H Nichols
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:26
CPC Classifications
C; C21; C21D; C21D1/00; C21D1/74; F; F23; F23C; F23C3/00; F23C3/002
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
149 words
IN A RADIANT HEATING UNIT A HOUSING FORMING A COMBUSTION CHAMBER CLOSED AT ONE END AND HAVING AN EXHAUST PASSAGE FOR THE PRODUCTS OF COMBUSTION AT THE OTHER END THEREOF, A TUBULAR MEMBER HAVING A PERFORATED WALL EXTENDING INTO SAID HOUSING IN SPACED RELATION WITH THE INNER AND END WALLS OF SAID HOUSING, SAID TUBULAR MEMBER BEING OPEN AT ITS EXTENDED END ADJACENT THE CLOSED END OF THE COMBINATION CHAMBER HOUSING TO CONDUCT A GASEOUS MEDIUM INTO THE SPACE BETWEEN THE TUBULAR MEMBER AND THE CLOSURE END OF THE COMBUSTION CHAMBER HOUSING AND THROUGH THE PERFORATIONS IN THE WALL THEREOF, A SECOND TUBULAR MEMBER DISPOSED IN SAID FIRST TUBULAR MEMBER IN SPACED RELATION THEREWITH HAVING AN OPEN END ADJACENT AND AXIALLY SPACED FROM THE OPEN END OF SAID FIRST TUBULAR MEMBER, SAID SECOND TUBULAR MEMBER BEING ADAPTED TO CONDUCT A GASEOUS MEDIUM TO THE OPEN END OF SAID FIRST-
Claim 2
Dependent Claim
149 words
IN A RADIANT HEATING UNIT A HOUSING FORMING A COMBUSTION CHAMBER CLOSED AT ONE END AND HAVING AN EXHAUST PASSAGE FOR THE PRODUCTS OF COMBUSTION AT THE OTHER END THEREOF, A TUBULAR MEMBER HAVING A PERFORATED WALL EXTENDING INTO SAID HOUSING IN SPACED RELATION WITH THE INNER AND END WALLS OF SAID HOUSING, SAID TUBULAR MEMBER BEING OPEN AT ITS EXTENDED END ADJACENT THE CLOSED END OF THE COMBINATION CHAMBER HOUSING TO CONDUCT A GASEOUS MEDIUM INTO THE SPACE BETWEEN THE TUBULAR MEMBER AND THE CLOSURE END OF THE COMBUSTION CHAMBER HOUSING AND THROUGH THE PERFORATIONS IN THE WALL THEREOF, A SECOND TUBULAR MEMBER DISPOSED IN SAID FIRST TUBULAR MEMBER IN SPACED RELATION THEREWITH HAVING AN OPEN END ADJACENT AND AXIALLY SPACED FROM THE OPEN END OF SAID FIRST TUBULAR MEMBER, SAID SECOND TUBULAR MEMBER BEING ADAPTED TO CONDUCT A GASEOUS MEDIUM TO THE OPEN END OF SAID FIRST-
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) | 1968-03-22 | 1968-09-21 | 1969-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-22 | 1972-09-21 | 1973-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-22 | 1976-09-21 | 1977-03-23 | $7700.00 | Window Closed / Lapsed |