US3294070A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas-cooled reactors
Assignee: Foster Wheeler Inc
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Filing: 1964-03-30
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Granted: 1966-12-27
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Expires: 1984-03-30
Abstract
No abstract record available.
Inventors
- 👤 Bell Alan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:03
CPC Classifications
F; F28; F28F; F28F13/00; F28F13/06; F28F13/12; F22; F22B; F22B1/00; F22B1/02; F22B1/18; F22B1/1823; F22B29/00; F22B29/06; Y; Y10; Y10S; Y10S165/00; Y10S165/91
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
182 words
IN A FORCED CIRCULATION BOILER HAVING A TUBE SYSTEM INCLUDING IN SERIES PREHEATING, EVAPORATING AND SUPERHEATING SECTIONS, THE IMPROVEMENT COMPRISING IN SAID SUPERHEATING SECTION A PLURALITY OF TUBES IN A CLUSTER INCLUDING A CENTER TUBE AND FIRST AN SECOND SETS OF TUBES SUBSTANTIALLY PARALLEL TO, COEXTENSIVE WITH AND REMOVED FROM SAID CENTER TUBE ON OPPOSITE SIDES THEREOF, THE CENTER TUBE HAVING A CROSS-SECTONAL AREA OF FLOW SUBSTANTIALLY LESS THAN THE CROSS-SECTIONAL OF FLOW IN THE EVAPORATING SECTION, SAID CLUSTER OF TUBE DEFINING A CIRCULAR ARRAY ENCOMPASSING THE CENTER TUBE, SAID FIRST SET OF TUBES BEING TWO TUBES ON OPPOSITE SIDES OF THE CENTER TUBE, SAID CROSSSECTIONAL AREAS OF THE CENTER TUBE AND FIRST SET OF TUBES BEING SUBSTANTIALLY EQUAL, MEANS FOR DIRECTING THE FLOW FROM THE EVAPORATING SECTION TO SAID CENTER TUBE, SECOND MEANS FOR DIRECTING THE FLOW FROM THE CENTER TUBE TO SAID FIRST SET TO SUPERHEATING SECTION TUBES, AND THIRD MEANS FOR DIRECTING THE FLOW THEREFROM TO THE SECOND OF SAID SETS OF TUBES SO THAT THE FLOW LEAVES THE SUPERHEATING SECTION AT AN END REMOVED FROM THE EVAPORATING SECTION.
Claim 2
Dependent Claim
182 words
IN A FORCED CIRCULATION BOILER HAVING A TUBE SYSTEM INCLUDING IN SERIES PREHEATING, EVAPORATING AND SUPERHEATING SECTIONS, THE IMPROVEMENT COMPRISING IN SAID SUPERHEATING SECTION A PLURALITY OF TUBES IN A CLUSTER INCLUDING A CENTER TUBE AND FIRST AN SECOND SETS OF TUBES SUBSTANTIALLY PARALLEL TO, COEXTENSIVE WITH AND REMOVED FROM SAID CENTER TUBE ON OPPOSITE SIDES THEREOF, THE CENTER TUBE HAVING A CROSS-SECTONAL AREA OF FLOW SUBSTANTIALLY LESS THAN THE CROSS-SECTIONAL OF FLOW IN THE EVAPORATING SECTION, SAID CLUSTER OF TUBE DEFINING A CIRCULAR ARRAY ENCOMPASSING THE CENTER TUBE, SAID FIRST SET OF TUBES BEING TWO TUBES ON OPPOSITE SIDES OF THE CENTER TUBE, SAID CROSSSECTIONAL AREAS OF THE CENTER TUBE AND FIRST SET OF TUBES BEING SUBSTANTIALLY EQUAL, MEANS FOR DIRECTING THE FLOW FROM THE EVAPORATING SECTION TO SAID CENTER TUBE, SECOND MEANS FOR DIRECTING THE FLOW FROM THE CENTER TUBE TO SAID FIRST SET TO SUPERHEATING SECTION TUBES, AND THIRD MEANS FOR DIRECTING THE FLOW THEREFROM TO THE SECOND OF SAID SETS OF TUBES SO THAT THE FLOW LEAVES THE SUPERHEATING SECTION AT AN END REMOVED FROM THE EVAPORATING SECTION.
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) | 1969-12-26 | 1970-06-27 | 1970-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-26 | 1974-06-27 | 1974-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-26 | 1978-06-27 | 1978-12-27 | $7700.00 | Window Closed / Lapsed |