Patent US2973251A successfully refreshed from Google Patents.
US2973251A
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US
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Heat transfer apparatus
Assignee: Babcock and Wilcox Co
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Filing: 1952-04-29
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Granted: 1961-02-28
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Expires: 1972-04-29
Abstract
No abstract record available.
Inventors
- 👤 Theodore S Sprague
- 👤 Marshall B Leland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 14:25
CPC Classifications
B; B01; B01J; B01J8/00; B01J8/18; B01J8/1836; F; F22; F22B; F22B31/00; F22B31/0007; F22B31/0015; F22B31/0023; F28; F28D; F28D13/00; B01J2208/00; B01J2208/00008; B01J2208/00017; B01J2208/00026; B01J2208/00035; B01J2208/00088; B01J2208/00106; B01J2208/00115; B01J2208/00132; B01J2208/00477; B01J2208/00495; B01J2208/0053
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
85 words
A CLOSED VESSEL OF CIRCULAR CROSS-SECTION, MEANS FOR MAINTAINING A FLUIDIZED BED OF PARTICLE-FORM SOLID MATERIAL WITHIN SAID VESSEL, MEANS FOR REGULATING THE TEMPERATURE OF SAID FLUIDIZED BED BY INDIRECT HEAT EXCHANGE WITH A HEAT EXCHANGE MEDIUM COMPRISING PAIRS OF REVERSE BEND CONNECTED HEAT EXCHANGE TUBULAR MEMBERS ANNULARLY DISPOSED IN A SUBSTANTIALLY HORIZONTAL PLANE WITHIN SAID VESSEL, AND BRACKET MEANS FOR SLIDABLY SUPPORTING SAID TUBULAR MEMBERS FROM THE WALL OF SAID VESSEL FOR MOVEMENT IN THE DIRECTION OF THE LONGITUDINAL AXES OF SAID TUBULAR MEMBERS.
Claim 2
Dependent Claim
85 words
A CLOSED VESSEL OF CIRCULAR CROSS-SECTION, MEANS FOR MAINTAINING A FLUIDIZED BED OF PARTICLE-FORM SOLID MATERIAL WITHIN SAID VESSEL, MEANS FOR REGULATING THE TEMPERATURE OF SAID FLUIDIZED BED BY INDIRECT HEAT EXCHANGE WITH A HEAT EXCHANGE MEDIUM COMPRISING PAIRS OF REVERSE BEND CONNECTED HEAT EXCHANGE TUBULAR MEMBERS ANNULARLY DISPOSED IN A SUBSTANTIALLY HORIZONTAL PLANE WITHIN SAID VESSEL, AND BRACKET MEANS FOR SLIDABLY SUPPORTING SAID TUBULAR MEMBERS FROM THE WALL OF SAID VESSEL FOR MOVEMENT IN THE DIRECTION OF THE LONGITUDINAL AXES OF SAID TUBULAR MEMBERS.
References Cited (Backward Citations)
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US2433798A
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US2341193A
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US2494337A
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US2565513A
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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) | 1964-02-28 | 1964-08-29 | 1965-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-02-28 | 1968-08-29 | 1969-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-02-28 | 1972-08-29 | 1973-02-28 | $7700.00 | Window Closed / Lapsed |