Patent US3247829A successfully refreshed from Google Patents.
US3247829A
Expired / Lapsed
US
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Furnace roof
Assignee: SUNBEAM ENGINEERING Corp
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Filing: 1964-01-30
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Granted: 1966-04-26
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Expires: 1984-01-30
Abstract
No abstract record available.
Inventors
- 👤 William A Morton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:33
CPC Classifications
F; F27; F27D; F27D1/00; F27D1/02; F27D1/021; F23; F23M; F23M5/00; F23M5/06
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
153 words
A FURNACE ROOF STRUCTURE COMPRISING: (1) A PLURALITY OF REFRACTORY ARCHES FORMED OF INDIVIDUAL BLOCKS OF REFRACTORY MATERIAL, EACH OF THE BLOCKS HAVING THE CORNERS TO BE LAID AS THE OUTER SURFACE OF THE ROOF CUT AWAY WHEREBY THE PLACING OF BLOCKS IN PARALLEL AND END-TO-END RELATIONSHIP FORMS A PLURALITY OF CHANNELS IN THE OUTER SURFACE OF THE ROOF; (2) COOLANT CONDUIT MEANS ARRANGED FOR CIRCULATION OF COOLANT THERETHROUGH PLACED WITHIN THE CHANNELS, THE CONDUIT MEANS EXTENDED FROM THE LOWER ENDS OF THE ARCHES TO THE UPPER ENDS THEREOF, MEANS SUPPLYING COOLANT TO THE LOWER END OF THE CONDUIT MEANS, THE UPPER ENDS OF THE CONDUIT MEANS HAVE AN OPEN DISCHARGE MEANS WHEREBY FLOW OF COOLANT THROUGH THE CONDUIT MAY BE VISUALLY OBSERVED; AND (3) HEAT RECEIVING SURFACES IN HEAT EXCHANGE RELATIONSHIP TO THE CONDUIT MEANS AND EXTENDING THEREFROM WITHIN THE CHANNELS WHEREBY HEAT IS ABSORBED FROM SAID REFRACTORY ARCHES INTO SAID COOLANT.
References Cited (Backward Citations)
US919186A
Cited
US1088634A
Cited
US1109553A
Cited
US1799632A
Cited
US1794705A
Cited
DE941809C
Cited
US2550078A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-04-25 | 1969-10-25 | 1970-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-25 | 1973-10-25 | 1974-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-25 | 1977-10-25 | 1978-04-26 | $7700.00 | Window Closed / Lapsed |