US3407789A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heating apparatus and process
Assignee: Stone and Webster Engineering Corp
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Filing: 1966-06-13
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Granted: 1968-10-29
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Expires: 1986-06-13
Abstract
No abstract record available.
Inventors
- 👤 Lawrence P Hallee
- 👤 Ellis J Green
- 👤 Herman N Woebcke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:06
CPC Classifications
C; C10; C10G; C10G9/00; C10G9/14; C10G9/18; C10G9/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
115 words
AN APPARATUS FOR THE CONTINUOUS HEATING OF FLUID MATERIAL COMPRISING WALLS OF REFRACTORY MATERIAL DEFINING A CHAMBER HAVING AN OUTLET PASSAGE AT THE TOP THEREOF, SAID CHAMBER CONTAINING DISPOSED THEREIN HEATING MEANS FOR SAID FLUID INCLUDING A PLURALITY OF CONDUITS ABOUT 60 TO 210 FEET IN LENGTH AND HAVING AN INSIDE DIAMETER OF ABOUT 2 TO 3 INCHES, SAID CONDUITS BEING DISPOSED IN SAID CHAMBER ABOUT EQUAL DISTANCE BETWEEN WALLS OF SAID CHAMBER, AND THE WALLS OF SAID CHAMBER CONTAINING A PLURALITY OF RADIANT HEAT BURNERS, SAID RADIANT BURNERS BEING SUFFICIENT TO PROVIDE AN AVERAGE HEAT ABSORPTION RATE OF 20,000 TO 35,000 B.T.U./HR./SQ.FT. OF CONDUIT RATE OF FLUID OUTLET TEMPERATURE OF 1500 TO 1600* F.
Claim 2
Independent Claim
115 words
AN APPARATUS FOR THE CONTINUOUS HEATING OF FLUID MATERIAL COMPRISING WALLS OF REFRACTORY MATERIAL DEFINING A CHAMBER HAVING AN OUTLET PASSAGE AT THE TOP THEREOF, SAID CHAMBER CONTAINING DISPOSED THEREIN HEATING MEANS FOR SAID FLUID INCLUDING A PLURALITY OF CONDUITS ABOUT 60 TO 210 FEET IN LENGTH AND HAVING AN INSIDE DIAMETER OF ABOUT 2 TO 3 INCHES, SAID CONDUITS BEING DISPOSED IN SAID CHAMBER ABOUT EQUAL DISTANCE BETWEEN WALLS OF SAID CHAMBER, AND THE WALLS OF SAID CHAMBER CONTAINING A PLURALITY OF RADIANT HEAT BURNERS, SAID RADIANT BURNERS BEING SUFFICIENT TO PROVIDE AN AVERAGE HEAT ABSORPTION RATE OF 20,000 TO 35,000 B.T.U./HR./SQ.FT. OF CONDUIT RATE OF FLUID OUTLET TEMPERATURE OF 1500 TO 1600* F.
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) | 1971-10-29 | 1972-04-29 | 1972-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-10-29 | 1976-04-29 | 1976-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-10-29 | 1980-04-29 | 1980-10-29 | $7700.00 | Window Closed / Lapsed |